That's right, it's a .NET program, and I'm sorry you don't want to install it, because I'd really like to help you out... maybe someone else would like to try this out, at least? Atrocities, perhaps? Or any of the other artist types around here?
And hey, maybe if this program becomes useful enough, someday you'll install the .NET runtime just to use it?
There is also Mono, which is an open-source Version of .NET, if that makes you any more comfortable... I'd have to recompile the program and I'm not sure if it would be compatible with Mono or not to begin with (for one thing I know I wouldn't be able to visually design any forms or dialog boxes; I'd have to code them from scratch
)
Wait... if you want an X file viewer, have you tried MeshX? It has basic modelling functions as well, and it's only $20 shareware...
http://www.spinnerbaker.com/meshx.htm