Just found this, looks like it could be very useful!
"Ever had a movie where you could hear only the sound but there were no video. Or only video and no sound. CodecInstaller is here to help you understand which codec you need and to let you install it in minutes. CodecInstaller is a Windows program that detects the Audio and Video codecs installed on your system, analyzes files to understand which codecs they require and suggests you to install them. CodecInstaller can also be used to distribute video files on a CD, to be sure that who receives the CD will have all the necessary codecs installed with a single tool he will be able to check if the codecs are already installed and up-to-date."
http://download.cnet.com/CodecInstal...html?tag=mncol