cheers for the response ... found a couple of proggies since ...
Xilisoft Video Encoder v2 , does give fair support for 3gp and just about every other video format I can think off ... all codecs are inbuilt so it doesn't screw with my original codecs installed in my PC .
some of the formats it supports converting from and to are: VOB , 3GP , Mpeg1 , Mpeg2 , Any DivX Format , XviD , RM , Mov , WMV all versions , AC3 ,WMA , MP3 , Wav... etc.
It's not free software but it works quite well for a all round video format converter in one.
ImToo Mpeg Encoder v2 is the exact same proggie but it's cheaper in price .
I'm now watching Species 3 on my nokia 6230 phone and it's in sync .... time to re-encode my Futurama Episodes I think.