Thanks for the info, Lenophis. I tried xkas, but it's not actually DOS (I don't think, as it doesn't run in DOSBox), and I don't really want to install Windows just for that. Maybe I'll ask Drewseph if he got it working without Windows, but I couldn't figure it out when I tried. Tracer works OK, at least from my limited understanding of ASM.
I've also studied ASM in hex a little, and I know I could do it that way, it just seems little too much work for me. I'm only passingly interested in ASM, so if I can't find something relatively easy, I might just stay away from it for now. Thanks again