how to convert (RMVP to wmv)

Could anyone tell me how to convert RMVP to wmv....? (or any format could be read at Pockeet PC) I want to watch movie at Pocket PC! tvb now,tvbnow,bttvb7 @; b& q7 |+ ]+ z; S* d( k& h4 }% t
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I am very appreciated if someone could be help this issue