@Dch48: Thanks for sharing your opinion!
@Tech: Thanks for comment!
@scythe944: Well, Part of your comment is correct, VLC almost play all common video/audio formats and it's customizable. But no Xvid is not a full pack of codecs and only install same codecs which windows 7 already has (yet you will neet codec for other formats and also some splitter like Haali and Gabest)