Easy Video Joiner can help you join multiple AVI, MPEG (MPG), RM (Real Media) or WMV/ASF (Window Media) files into one large movie file. You can add an unlimited number of video files as you like to the list and easily rearrange their order if needed. With just a few mouse clicks, you can enjoy your movie clips without interruption. It can also join most audio files with popular formats (mp3, rm, wma, wav).
More info:
hxxp://www.10m.org/ezjoiner.exe