I've got a complete codec installaer made by Kazaa (it's not illegal), when I get home I'll upload it and send you a link. I used to have lots of problems with codecs and files not opening and playing, that installer fixed all my codec issues. So if in like 5 hours you're still in need of help, I'll send you the link (Don't get home until around 7pm tonight, GMT -5)
Cheers
