See the Offline Ship Viewer thread. Basic important of OBJ files is in the lastest post. I did scaling differently. Basically you say the \"longest dimension\" you want, and it scales the data in the OBJ automatically.
For example, the model I tested with had bounds of (-2.05, -9.849999, -2.349999) -- (2.049999, 1.15, 2.85). I requested a ship witha longest dimension of 100. The widest dimension of the model was 11, so it automatically scaled by 9.09. The resulting ship boundaries were (-19, -90, -22) -- (19, 11, 26).
I think OBJ files are pretty universal. But please try it out with your favorite models so I can be sure of the limits. I think larger models will run it out of memory, but my test one was 20 megs, and it worked for that, so I\'m hopeful.