Media Control Plugin for Media Center - One great thing with Media Center is the all-in-one concept : you have all your pictures, music, videos and TV shows accessible from one remote control. Media Center customization is rather limited. For example, it was not possible to do a fast forward for "non-microsoft" encoded videos. And what about MKV or AVI videos which have multiple audio and subtitle streams? How do you switch between them? What about external subtitle files? This is only a few of the things that this plugin allows. Of course all these features are accessible using the remote control too! FFDshow is pre-configured in current releases to use this plugin but you will need to change the subtitle renderer on the Config TAB of the Settings Application to use ffdshow also.
The above Plugin is recommended by Shark007