htpc- what do I need to install for playback

[ArchAnGeL]

What do I need to install on top of vista ultimate for playback of xvid, divx, mkv etc?

Normally I would put in vlc and k-lite pack but I was planning on using coreAVC so I didn't want anything to interfere with that.

So at the moment I have:-

drivers, upates, AV etc
core avc
haali media splitter

what else should I add? What is known to conflict with AVC regarding mkv playback?

 

[ArchAnGeL]

I would have thought that all you need to do is specify the coreAVC codec as the one to use for mkv and other high def formats that it supports in WMP11 or the Media Center portion?

how do you specify which codec is used?