Codec package for windows media player on windows mobile device

[KenDaMan]

I am searching for a Codec package for my windows media player on my windows mobile pocket pc. I would like to play all video formats on my Phone/Pocketpc. Is there a package like the vista codec package but made for windows mobile devices. I realy dont want to have to install a different player when i have windows media player on it. I tried that and they dont play my mp4 videos. I just want to expand my codec package for my media player that is already on my pocketpc.