You can download the codec for avis but you might need other codecs in future. Here you will find all of them:

http://www.codec-download.com/module...name=Downloads

Perhaps you should download and install the ACE codec pack, it contains all common codecs. If you don´t want to install all codecs, download and install the DivX codec, if your .avi isn´t playing after this find out which codec you need:

http://www.softpedia.com/public/cat/...1-2-7-58.shtml

Morgwen