CCortes, do you have an SD memory card and a card reader, if so there is a much better way than having to convert the AVI to something your player will accept. You'll probably have to run that AVI through Active Sync which is an awful program. I use Sony PSP selection in CloneDVD Mobile, the third selection down on the list. On the fourth screen I change the output file name and directory to the root directory of my SD memory card. Most players will play an MP4. The quality is great and never have an audio sync problem. And it's saved directly to the memory card.
If you have a memory card and a slot for it in your computor, just drag and drop to the card. It's much faster, usually less than 7 minutes.