Did it actually refuse to run though? I recall they initially demoed it (when it was still in beta) exclusively on Quadro's (and made some outrageous performance claims related to those too while they were at it). I always ran it on Geforce's and don't recall any time it did not run or became a crashfest or anything.…
Whats the resolutions of the texture export? There's sections of the decals that look really pixellated that might be a texture resolution export issue.