Z-modeller is a very nice program, not very buggy. You get alot for nothing. But I haven't had much luck importing or exporting with it. Its 3DS format does not work well with MilkShape, and the interface is difficult to learn, at least compared to MilkShape. GMAX is very much like 3D MAX, which is cool. I haven't had a chance to mess with it, but I know it is compatible with Quake III models, and so is MilkShape, maybe you can export as QIII from GMAX and then import that into MilkShape.
By the way, hi to every one, I miss being able to hit this forum as often as I used too, take care,
Interstellar Machine