Well XP codec pack really isn't that bad. Only reason I switched is because it has terrible x264 support.

Seriously you should try the CCCP codec pack. Just install Media player Classic (MPC) with it, not Zoom player (also incl. in the download)

MPC is a very good standalone player, which is low on resources and has all the functions you would want in a player, and you aren't getting in WMP.

Only only conflict known is if you also use VobSUB to make DVD subtitles, in which case I wouldn't recommend it.

And I remind you and everyone reading this once again. DO NOT USE MORE THAN ONE CODEC PACK. It will in many cases cause heaps of trouble.

P.S. xCom isn't very old and is just trying to help