I found a very good software named Pocket Video Converter, a powerful video converter for Pocket PC, Smart Phones, Palms, and more mobile devices. The Pocket Video Converter is capable of converting almost all popular video formats such as vob, DivX, XviD, MOV, rm, rmvb, MPEG, WMV, AVI to mobile device format(WMV、WMA、Mp3). All the conversion processes are very easy and fast with high quality.
maybe it is very useflul for you
you can get it here http://www.dvd-ripper-copy.com/pocket-video-converter.html