shadymg:glad to hear it's fixed!
I'm not familiar with .MKV...but there has to be a standalone codec to avoid having to use the "packs"
I use MKV files time to time...
http://haali.cs.msu.ru/mkv/
Not sure if it's the newest version but, what you need to play these files back is Matroska Splitter, with out the junk of the codec packs. Also a little reg hack to make the files show up in the video library.
-Dave
MCP, MCSA, MCSE 2003
Windows Vista Connected Exp:Home Theater for Technologists
Windows Vista Connected Exp:Home Theater for Sales professionals
Home theater specialist (10+ years)