Hmm, so you basically load an ms3d file into fragmotion and then just export it out into .x without doing anything to it?
I have 3D Canvas Pro - it doesn't allow me to import or export ms3d files but it can do 3ds, dxf, bvh, x (obviously), iob, lwo, md2, nof, raw, rwx, cob, wrl, obj, nff, xgl and zgl. I assume you're using milkshape for modeling? If so, maybe you can export to one of those formats in milkshape, send it to me, and I could export it into x format. If that doesn't work maybe I could download milkshape (it's free, isn't it?) and you could send me the ms3d and I could do basically the same thing. Of course, that would mean I'd have to do the animations (which I don't mind at all) but you'd probably want to do them yourself, so you have more control over how everything fits together. Animating in 3DC has never been a problem for me (except that you can only have a certain number of frames) so I'd be happy to do any animating if it's the difference between custom and stock media for PoM.
I just think it would be a shame to finish the game using only stock media and retextured stuff: retexturing is good but it can only go so far. Some of the tanks, weapons, etc. in this game would be represented far better if they were custom, seeing as how it's so unlike most marine-stuck-in-a-concrete-base-with-aliens shooters.
I'm not actually a Kiwi, I just randomly thought it up one day.