[SixOfSpades]

It sounds like some of the animation files (specifically, the ones that show a demon or wyvern either dead or dying) are either missing or corrupted. Xero was half right: If the problem is what I think it is, patching won't do a thing, but reinstalling should correct it. If it doesn't work, then that part on your CDs must be damaged, & you should try again with someone else's CDs.