out of subject
I have 3ds max 5, so I dunno if it's the same.
to fix it in 3ds max 5:
1st: select everything, go in the "utilities" tab (on the left, the little hammer)and select "collapse" then collapse selected, it will make an united mode of the whole thing
2nd: select you new model, go in the "modify" tab (same place) , in the list, click on "Editable mesh", go down a bit and select the red triangle.
3rd: go on one of your viewports and press CTRL+A (to select ALL faces)
4th: scroll down in the modify tab until you see "Surface properties" and click on the "flip" button.
It should reverse the way off all the selected faces and give you an almost perfect model.
you must have extracted it using Icepir8's TR64 OGL right? so you must do that, nemu gfx doesn't have this prob but can't run a lot Perect Dark.