I'm using lime wire with i tunes and now all my downloads from lime wire are in quicktime, I can't read them with i tunes. What can I do to have it in the right format for i tunes, thank you A LOT...

I am not a MAC user but I am pretty sure the problem is not with the files themselves rather your MAC is associating MP3 files with Quicktime rather than Itunes - you might want to search the MAC forum as I believe I saw some discussion regarding this very issue recently.

you need itunes Associator. Install it, put it on your desktop and drag mp3s onto its icon to make them compatible with itunes.