ok just checking but are internal faces when you view a model and zoom way in so you look inside-out, i hope that makes sense

, you can see maps applied to the inside of a model, on models that work if you do this it's invisible, but not on the models that are screwed up. Is that right? If so then yup i have that problem.
I have blender, will it get rid of them or just tell you that they are there?
Oh and i found the puddlejumper, i can get it to save as a POF but it crashes FRED, is probably the same problem?
*edit* ok so i found the manifold thing in blender but when i click it nothing happens...
thanks again for the help!