I think I figured this out and much of the way I came to these conclusions is in your main topic, but here's the fruit of the work anyhow.
All of these coincide with the pointers in the NPC Speech data that was written in Phoenix's NPCs.txt. And you can see this at work in the events themselves, when an event randomly calls to a map, it's calling based on these algorithms. Starts and stops are not clearly defined. Every map has one entry (if there is no applicable text a T is used to mark it) so some work has to be done to figure out where things are. But they go hand in hand with the map labels so there's no worry on that. It will just take a little time and record keeping to figure these out.
And it's finished! Here are the results and I hope they help you manage to put them into the editor (like you did with Banks 1 and 3)
Town of Baron - 000 - 011
Mist - 012 - 015
Kaipo - 16 - 1C
Mysidia - 1D - 32 (There is curiously a "D"' texts here. I was able to get the respective NPC to appear by starting the game in Mysidia. Apparently an Event Flag seems to cancel it. The fellow it belonged to was a Black Mage that stood beside the entrance to the stairway of the Hall of Wishes, I wonder what purpose he was to have to have been cancelled out in that manner.)
Silvera - 33 - 3C
Troia - 3D - 44
Agart 45 - 4C (There's a D here as well)
Numerous shops - 4D - 50
Baron Inn - 51-5D (Another D here, you get the feeling there's a bit of unused content)
Baron Weapon/Armor Shop - 5E
Cid's House - 5F - 67
Rosa's House - 68 - 6A
Rydia's House - 6B
Kaipo Inn 1F - 6C - 70 (This is a bit of a guess, since I'm not sure whether the D's were originally for Rydia's House or the Inn.
Kaipo Inn 2F - 71 - 74
Kaipo Sickhouse - 75 - 7A (Oddly enough in the text there is an instruction to play music. In essence would that mean that you can "sneak" other events into normal text?
Mysidia Inn 1F - 7B - 8C
Mysidia Inn 2F - 8D
Mt Ordeals (Room of Mirrors) - 8E
Mysidia (House of Wishes) - 8F - A5 (Quite a few D's here but they seem legitimate placeholders so they can easily access things for the books.)
Mysidia (Tower of Wishes) - A6 - AD (I have to say, I never realized that the Elder had a special line for Tellah's death.)
Troia Cafe 1F - AE - B7 (A bit of guesswork here, I can't quite tell when one floor begins and another ends here)
Troia Cafe 2F - B8 - BD (More guesswork)
Saloon KING - BD - C4 (Seems to have been a few cut lines here it seems, judging by the D's and no shopkeeper placeholders for their to be a reason.)
1B - unused - C5
Black Chocobo Farm - C6 - C9 (A bit of guess work here as well)
Black Chocobo Farm B1 - D5 (An absurd amount of D's here)
Astro Tower - 0D6 - 0DA
Astro Tower 2F - DB
Agart Inn - DC - E3
Chocobo Village - E4
Town Water Background - E5
Castle Interior floor Background - E6
Baron Castle - E7 - F9
Damcyan - FA
Fabul - FB - FE
Troia - FF - 106
Eblan - 107
Castle Exterior Desert Background - 108
Baron 1F - 109 - 114 (I believe so. I could be wrong here.)
Baron 2F - 115 - 123
King's Room - 124 - 134
Baron Left Hallway - 135 - 13F (A lot of D's. I wonder what they planned here at one point)
Baron Right Hallway - 140
Baron Dungeon 1F - 141
Baron Dungeon 2F - 142 - 146
Baron Knight's Quarters - 147 - 150
Baron Left Tower F1 - 151
Left Tower F2 - 152
Left Tower F3 - 153
Baron Right Tower- 154
Right Tower 2F - 155
Right Tower 3F - 156
Right Tower B1 - 157
Right Tower B2 - 158
Old Water-way (entrance) - 159
Old Water-way B3 - 15A
Old Water-way B1 - 15B
Old Water-way Save Point - 15C
Old Water-way B2 - 15D
Damcyan 1F - 15E
Damcyan 2F - 15F
Damcyan 3F - 160 - 16E
Damcyan Treasure Room - 16F
Damcyan Basement - 170
Baron (entrance to Old Water-way) - 171
Agart Weapon Shop - 172
Agart Armor Shop - 173
Fabul F1 - 174 - 177 (A bit of a guess on this one, but as the next one is the first text of the normal soldiers on the second floor I think it's a safe assumption.)
Fabul F2 - 178 - 17B (There's also a fair amount of D's here but according to the NPC's.txt the Chancellor has event 2A which would be the 03 Message in the sequence which is 04, which also goes to explain the presence of the D's. This is done to use that same space allocation with other references to the Old Man sprite in other maps.)
Fabul King's Room - 17C - 17F
Fabul Crystal Room - 180
Fabul Weapons/Armor - 181
Fabul Inn/Item Shop - 182
Fabul Right Tower 1F - 183 - 185
Fabul Right Tower 2F - 186 - 18C
Fabul Right Tower 3F - 18D - 194
Fabul Left Tower 1F - 195
Fabul Left Tower 2F - 196 - 199
Fabul Left Tower 3F - 19A - 1A4
Small Grove (After Mist events) - 1A5
Watery Pass (Save Point) - 1A6 - 1A7
Troia Castle 1F - 1A8 - 1Af (There's a D at the end here that I'm nearly certain belongs here. If you go directly to Troia without setting any flags the text is a bit screwy and a guard may have some Dummied dialogue)
Troia Castle Epopt's Room - 1B0 - 1CD (The Epopts have a lot more text than I remember.)
Troia Crystal Room - 1CE
Troia Hospital - 1CF - 1D7 (Another Tellah related line I missed. He's my favorite character in the game and all these years I missed the Elder and Edward both having special lines regarding his death)
Troia Castle Right Room F1 - 1D8
Troia Castle Dungeon - 1D9 - 1DC
Troia Castle Small Room - 1DD
Troia Castle Treasure Room - 1DE
Troia Castle Big Treasure Room - 1DF
Eblan 1F - 1E0
Eblan 2F - 1E1
Eblan Throne Room - 1E2
Eblan Left Tower 1F - 1E3
Eblan Left Tower 2F - 1E4
Eblan Right Tower 1F - 1E5
Eblan Right Tower 2F - 1E6
Eblan Basement - 1E7
Baron Black Magic Room - 1E8 - 1ED
Baron White Magic Room - 1EF - 1F4
Castle Exterior Desert Background - 1F5
Training Room (original) - 1F6
Waterfall - 1F7
Castle Exterior Water Background - 1F8
Misty Cave - 1F9 - 1FB
Room of Mirrors Background - 1FC
Watery Pass Background - 1FD
Watery Pass South - 1FE
Watery Pass B2 (Heading to save point) - 1FF
Watery Pass B3 (Islands) - 200
Watery Pass B2 (Tunnels) - 201
Watery Pass North - 202
Watery Pass (Waterfalls) - 203
Watery Pass (B2, Bottom of Falls) - 204
Watery Pass (Lake) - 205 - 207
Antlion's Cave B1 - 208
Antlion's Cave B2 - 209
Antlion's Cave (Antlion's Den) - 20A
Antlion's Cave (Save point) - 20B
Antlion's Cave (Treasure Room) - 20C
Castle Interior Black Background - 20D
Misty Cave Background - 20E
Mt. Hobs (West) - 20F - 216
Mt. Hobs (Summit) - 217 - 220
Mt. Hobs (East) - 221
Mt. Hobs (Save Point) - 222
Mountains Background - 223
Watery Pass (Secret Waterfall Room) - 224
Mt. Ordeals (Entrance) - 225
Mt. Ordeals (3rd Station) - 226
Mt. Ordeals (7th Station) - 227
Mt. Ordeals Summit - 228 - 229
Mysidia Crystal Room - 22A
Mysidia Serpent Road - 22B
Baron (Shrinking Hallway) - 22C - 239
Agart (Well) - 23A
Cave Magnes (Entrance) - 23B
Cave Magnes (B2 Large Pits) - 23C
Cave Magnes (B2 Pits) - 23D
Cave Magnes (B3) - 23E
Cave Magnes (B2 Treasure Room) - 23F
Cave Magnes (B2 Passage) - 240
Cave Magnes (Save Point) - 241
Cave Magnes (B4) - 242
Cave Magnes (Crystal Room) - 243 - 246 (Strange, I don't recall the message "Sealed by Dark Elf." ever in the game.)
Cave Magnes Background - 247
Watery Pass (Inside tent) - 248
Baron Serpent Road - 249 - 24B
Tower of Zot (Entrance) - 24C
Tower of Zot (2F) - 24D
Tower of Zot (3F) - 24E
Tower of Zot Background - 24F
Tower of Zot (4F) - 250
Tower of Zot (5F) - 251
Tower of Zot (6F) - 252
Tower of Zot Command Center - 253 - 259
Adamant Grotto - 25A - 25D
Cave Magnes (Save Point 2) - 25E
Tower of Zot (Save Point) - 25F
Enterprise (Flying with People) - 260 - 261
Enterprise (Flying with no People) - 262
Enterprise (Flying with Edward) - 263
Tower of Babil (Save Point) - 264
Tower of Babil Entrance - 265 - 266
Tower of Babil B2 - 267
Tower of Babil B3 - 268
Tower of Babil B4 - 269
Tower of Babil Crystal Room - 26A
Tower of Babil B5 - 26B
Underground Tunnel (Transparent layer) - 26C
Underground Tunnel Background) - 26D
Crystal Room Background - 26E
Cecil's Room (Ending) - 26F
Training Room 1F - 270 - 279
Training Room 2F - 27A - 285
Unused - 286
Unused - 287
Giant of Babil Mouth - 288
Giant of Babil Neck - 289
Giant of Babil Chest - 28A
Unused - 28B
Giant of Babil Stomach - 28C
Giant of Babil Passage - 28D
Unused - 28E
Giant of Babil Lung - 28F - 298
Giant of Babil CPU - 299
Giant of Babil Background - 29A
Unused - 29B
Airship (single prop, screen center) - 29C
Port of Fabul - 29D
Ship (Sailing) - 29E
Enterprise (docked) - 29F
Airships (connected by a bridge) - 2A0 - 2A7
Airship (single prop, screen left) - 2A8
Enterprise (Flying Underground) - 2A9
Eblan Cave Entrance - 2AA
Eblan Cave Settlement - 2AB - 2B4 (With no flags marked there is one soldier that says "D")
Eblan Cave (Pass to Babil) - 2B5 - 2B6
Eblan Cave (Exit) - 2B7 - 2B9
Eblan Cave Inn/Item - 2BA
Eblan Cave Weapon - 2BB
Eblan Cave Save Point - 2BC
Eblan Cave Infirmary - 2BD - 2C7
Chobobo Forest (Fabul) - 2C8
Enterprise (Blue sky) - 2C9 - 2CC
Chocobo Forest (Mt. Ordeals) - 2CD
Chocobo Forest (Baron) - 2CE
Chocobo Forest (Troia) - 2CF
Chocobo Forest (Island) - 2D0
Baron (Empty King's Room) - 2D1
Enterprise (Black background, Pilot) - 2D2
Enterprise (Blue sky, Pilot) - 2D3
Enterprise (Underground, Pilot) - 2D4
Enterprise (Black Background, Pilot) - 2D5
Mysidia (Room of Wishes) - 2D6
Airship Background - 2D7
Large Dock - 2D8
Unused - 2D9/
Unused - 2D9/2DA
Small Dock - 2DB
Village Mist (Inn) - 2DC
Village Mist (Weapon) - 2DD
Village Mist (Armor) - 2DE
Kaipo (Weapon) - 2DF
Kaipo (Armor) - 2E0
Mysidia Weapon Shop - 2E1
(This is very strange. I've counted and counted again and Mysidia Weapon Shop should be 2E1, as you can see, it is, but it shares that with the Mysidia Weapon Shop. I have checked and rechecked to see if I made an error in counting or missed a map or something along those lines, but there's no such thing. My only thought is that one of the two Unused maps were not included into the Map Dialogue Bank. Other then that I don't know what the issue is.
Mysidia Armor shop. - 2E2 - 2EB (A lot of placeholders to align with Black Mage Actor's text)
Mysidia Item Shop - 2EC
Silvera Inn - 2ED - 2ED
Silvera (Weapon) - 2EE
Silvera (Armor) - 2Ef
Silvera (Item) - 2F0
Baron (Item) - 2F1
House of Wishes (Ending) - 2F2
Palom and Leonora (Ending) - 2F3
Edge in Eblan (Ending) - 2F4
Rydia with summoned monsters (Ending) - 2F5
Edward in Damcyan (Ending) - 2F6
Castle of Dwarves (Ending) - 2F7
Kain on Mt. Ordeals (Ending) - 2F8
Observatory (Ending) - 2F9
Cecil's Room (Ending) - 2FA
Baron King's Room (Ending) - 2FB
Yang in Fabul (Ending) - 2FC
Unused - 2FD
Unused - 2FE
Unused - 2FF
Overworld Map - 300
Underworld Map - 301
Moon Map - 302
Same Map? - 303
Location trigger/ Visual Effects call - 304
Kokkol, the Smith's - 305 (There's some discrepancy that I can't quite figure out. I'm apparently missing 306 and 307 because Tomra starts at 308.)
? - 306
? - 307
Tomra - 308 - 30D
Kokkol's Smith (1F) - 30E - 315
Kokkol's Smith (2F) - 316 - 319
Tomra Inn - 31A - 31B
Tomra Weapons/Armor - 31C
Tomra Storage House - 31D - 31E
Castle of Dwarves (Entrance) - 31F - 326
Castle of Dwarves (1F) - 327 - 331
Castle of Dwarves Throne Room - 332 - 339
Castle of Dwarves B1 - 33A - 344
Castle of Dwarves B2 - 345 - 346
Crystal Room Background - 347
Castle of Dwarves Crystal Room - 348
Castle of Dwarves Weapon/Armor - 349 - 34A
Castle of Dwarves (Dwarven Base) - 34B - 350
CoD Right Tower 1F - 351
CoD Inn/Item Shop - 352
CoD Infirmary - 353 - 35E
CoD Left Tower 1F - 35F
Tower of Babil (Save Point) - 360
Tower of Babil (IceBrand Room) - 361
Tower of Babil (Blizzard Spear Room) - 362
Tower of Babil (Ice Shield Room) - 363
Tower of Babil (Ice Armor Room) -364
CoD Right Tower 3F - 365
CoD Left Tower 3F - 366
CoD L/R Tower 2F - 367 - 368
CoD Background - 369
Tower of Babil 8F (1) - 36A
Tower of Babil 7F (1) - 36B
Tower of Babil 6F (1) - 36C
CoD Cafe Howdy! - 36D - 36E
Tower of Babil (Underworld Entrance) - 36F
Tower of Babil 2F - 370
Tower of Babil 3F - 371
Tower of Babil 4F - 372
Tower of Babil 5F - 373
Tower of Babil 6F - 374
Tower of Babil 7F - 375
Tower of Babil 8F - 376 - 382
Unused - 383
Unused - 384
Unused - 385
Big Whale - 386 - 387
Tower of Babil (Cannon Room) - 388 - 38F
Tank - 390
Big Whale (Different NPC's) - 391
Tower of Babil Background - 392
Palom and Leonora (Ending) - 393
Tomra Item Shop - 394
Mysidia (Tower of Wishes) - 395 - 3A0
Castle Interior Floor Background - 3A1
Town Water Background - 3A2
Cave of Summons(entrance)- 3A3
Cave of Summons B2 - 3A4
Cave of Summons B3 - 3A5
Sylvan Cave Background - 3A6
Town of Monsters - 3A7 - 3AA
Town of Monsters (Treasure Floor) - 3AB
Town of Monsters (B2) - 3AC - 3AF
Town of Monsters (Save Point) - 3B0
Town of Monsters (Library) - 3B1 - 3C0
Town of Monsters (Library B2) - 3C1 - 3CC
Town of Monsters (Throne Room) - 3CD - 3D4
Town of Monsters (Weapon) - 3D5 - 3D6
Town of Monsters (Armor) - 3D7 - 3D8
Town of Monsters (Inn/Item Shop) - 3D9 - 3DB
Sealed Cave Entrance - 3DC
Sylvan Cave Entrance - 3DD
Sylvan Cave B1 - 3DE
Sylvan Cave B2 - 3DF
Sylvan Cave Treasure Room - 3E0
Sylvan Cave (Sylph's House) - 3E1 - 3F3
Sealed Cave B1 - 3F4
Sealed Cave Treasure Room 2 Chests Spaced - 3F5
Sealed Cave Passage - 3F6
Saled Cave B2 - 3F7
Sealed Cave Treasure Room 2 Chests Closed - 3F8
Sealed Cave Treasure Room 3 Chests - 3F8
Sealed Cave Treasure Room 1 Chest - 3FA
Sealed Cave Passage 1 Chest - 3FB
Sealed Cave B3 - 3FC
Sealed Cave Passage 2 Chests, Pillar - 3FD
Sealed Cave Treasure Room with Boxes - 3FE
Sealed Cave B4 - 3FF
Sealed Cave Save Point - 400
Sealed Cave Bridge to Crystal Room - 401
Sealed Cave Empty Room/Save Point - 402
Sealed Cave Crystal Room - 403
Cave Bahamut B1- 404
Cave Bahamut B2 - 405
Cave Bahamut B3 - 406 - 40B
Unused - 40C
Unused - 40D
Unused - 40E
Crystal Palace (Entrance) - 40F
Crystal Palace (Crystal Room) - 410 - 41F
Lunar Maps background - 420
Lunar Path 1 - 421
Lunar Path 2 - 422
Hummingway's Cave - 423 - 426
Crystal Palace Background - 427
Lunar Subterraen B1 - 428
Lunar Subterraen B2 - 429
Lunar Subterraen B2 - 42A
Lunar Subterraen B3 - 42B
Lunar Subterraen B4 - 42C
Lunar Subterraen B5 - 42D
Lunar Subterraen B6 - 42E
Lunar Subterraen B7 - 42F
Lunar Core B1 - 430
Lunar Core B2 - 431
Lunar Core B3 - 432
Lunar Core B4 - 433
Lunar Core (Core) - 434
LS (B4 Treasure Room 1 Chest) - 435
LS (B4 Treasure Room 2 Chests) - 436
LS (B5 Treasure Room 3 Chests) - 437
LS (B5 Treasure Room 1 Chest) - 438
LS (B5 Save Point) - 439
LS (B6 Treasure Room) - 43A
LS (B7 White Lance Room) - 43B
LS (B7 Save Point) - 43C
LS (B7 Treasure Room, 2 Chests) - 43D
Lunar Core Background - 43E
Unused - 43F
Unused - 440
(Nothing) - 441
Whew! There we go! Each of the text pointers and to what map they correspond with, I really hope this helps you out.
We have EVEN MORE themes now, but some old ones are gone...