M-peg 2

Hi, I've just got my first mac, and FCE for doing my video editing. Using ClipWrap to convert my HD footage in to AIC format which works lovely with easy and files look good in FCE.
But i have some old clips that i uploaded and converted on my PC into M-peg 2 files. But neither FCE or imovie can read. And ClipWrap can't convert them either.

Is there anything i can do to use these clips in FCE.

Thanks for any help you can give.