I need advice how to watch .Avi movies on my ibookg4 which has quicktime player.

I downloaded season 5 of weeds, and the files are an .avi file. My quicktime player shows that i need a third party application for quicktime to play. I downloaded perian, which i thought would solve the problem but it doesn’t help. When i go to the mac quicktime components page, i don’t know what to download. i don’t have a ton of memory, and my mac is version 10.4.11 – so divx codex wouldn’t download. I only want it to watch movies, not edit, or do anything fancy. ... and i’ve been so stoked to see this season, and am so close can anyone advise?!