Now we have iTunes 4 and AAC encoding capabilities, I'd like to re-rip my CD albums into the more efficient AAC encoding format. However, the already encoded mp3s in my iTunes library have personalised ID3 track info, such as genre, comments, ratings, etc. Re-ripping the CD will be fine, but how can the ID3 info be copied into the new AAC tracks from the existing mp3 ones. I realise this could be done by hand, typing in the details to each track again and re-rating, etc. Is there no better way to copy and paste this info for a bunch of tracks in one go?