[Mojo]

How do you change the file extensions from .mov to .mpeg???

Cuz I have the UYI clip, but my computer is kinda slow, so the whole movie is all crappy...

But when I play files within KaZaA, all runs perfect...
The point is that my computer refuses to show UYI in KaZaA, due to the .mov extension. When I order it to play, it starts QT, and I wanna change that... Is there by any chance a way to change it at all, and if it can be changed, could you tell me how???