This explains what you need:
[i]Changes from DJBCP Codec Pack 5.0.0.3 to DJBCP Codec Pack 5.1.0.1 :
- all codecs are compatible with Windows Media Player
- updated DivX 6.03 Pro to version DivX 6.1 Pro
- updated lame3.97a9 to version LAME 3.98 alpha 2
- updated OggDrop 1.6.11e to version oggdropXPdV1.8.6
- updated WinVorbis 1.54 to version WinVorbis 1.57
- updated BeSweetv1.5b27 to version BeSweet 1.5b31
- updated VirtualDub 1.6.9.0 to version VirtualDub 1.6.11
- updated VirtualDub Mod 1.5.10.1 to version VirtualDubMod 1.5.10.2
- updated DVD Decoder Package
- updated vp6 vfw Codec 6.2.6.0 to version vp7 VFW Codec Version 7.0.8.0
- added flac 1.12 (AAC Encoder)
- Added following extensions to Windows Media Player when ogg codecs are installed: .ANX, .flac, .OGA, .ogg, [b].OGV[/b], .SPX
- removed all ogg codecs and replace it with a filterpackage oggcodecs 0.69.8924. (Is able to play Ogg Vorbis, Speex, Theora and FLAC files in Windows Media Player, BS Player and many more!)
- removed vlc (VideoLan) cause of having many problems with dts sound[/i]
You can download the Codec pack from here:
http://tinyurl.com/mouxl
:)