Nope, you did not post in the right location. If you had read the huge paragraph on http://www.celephais.net/board/create_thread.php
you would have known that "Mapping Help" would have been the right thread.
No idea about your problem. Have you tried letting someone with a normal graphics card running the compiled maps?
Spirit, he didn't read the paragraph just as improperly as you read his post. :)
I'm not sure myself, but IIRC it's either about the shaderlist/scripts file not being in the directory that Radiant wants it to be, or that the textures have to be extracted from the pk3 in order for it to load them.
can you post a screenshot? it sounds like the texture memory is being corrupted somehow...
So it seems I didn't read the post very properly, either.