There was one I used for a while that I downloaded as shareware off of www.download.com I honestly do not recall the name, but if you do a search for 3d viewing or X file viewer, or something like that you might hit paid dirt. Good luck.
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Creator of the Star Trek Mod - AST Mod - 78 Ship Sets - Conquest Mod - Atrocities Star Wars Mod - Galaxy Reborn Mod - and Subterfuge Mod.