Thank you for taking time to answer to a clueless beginner.
1. Oh, you made those tools. Muy bueno. Larian should hire you! Is there any kind of documentation for the importing pipeline other than what people wrote on those threads? I work mainly with 3ds max, zBrush and PS.
4. A heightmap would work, too, yes, but I was thinking more like a 1km x 1km texture on top of terrain to place buildings on, since pen and paper rpg's have (usually) hand drawn maps.
- Naamapokemen