iTunes help.

[Nex]

Was just wondering if there was any patches or codec you could download to get itunes to play .avi files without having to convert to MP4 to get them in your movies play list.

[The Mob]

are you running a mac or pc?
im going to assume a pc,
but if you are running a mac, as long as quicktime can open the .avi, then it will be added to itune's library. here is a codec package Perian - The swiss-army knife of QuickTime® components