The mod supports all the codecs supported by Windows Media Player 11. Reading the ZuneBoards forum thread about this, some people say it works fine and some have problems with it. Of course use this at your own risk.
This is a mod made so that the Zune program will support more types of video, audio, and image extensions.
Goal: The goal of this mod is to make it so multiple new file extensions can be played and/or synced with the Zune device in the Zune program.
Version: Gamma
Progress:
Audio: .aac, .aif, .aifc, .aiff, .au, .cda, .mid, .midi, .rmi, .snd, and .wav files are now automatically added to your library and later converted and synced with the Zune device. They will not play in your Zune program, though.
Video: .asf, .avi, .dvr-ms, .m1v, .m2v, .mod, .mp2, .mp2v, .mpa, .mpe, .mpeg, .mpg, .mpv2, and .wm videos are now automatically added to your library and later converted and synced with the Zune device. They will not play in your Zune program, though.
Images: .png, .bmp, .gif, and many other image file types have been found as being supported by the Zune program (you can open and view them with it - try it out!), but as of yet they cannot be added to the library or synced to your device.
What is the benefit of this since the program won't play most of the files?
Well, this makes it that even though the program won't play the files, it can and will easily convert them for use on you Zune. This will save you the time and hassle of having to download any third-party software to listen to your songs, watch movies, etc. etc. on your Zune. Also, it will make it so that the files are automatically converted to the exact specifications used on the Zune device, so no guesswork involved. It also adds the songs and movies to your library.