If your s30 is the I have a pic of it should convert DVRMS....its what its built for !!
If you are having problems you really need to look at your setup/device properly.
I had some troubles with my iriver, but it was just the result of too much USB clutter. When I ghosted back to fresh install and installed WMP 11 ive had no probs
there are quite a few dvrms conversion tools out there. There is a section here all about it. WMP uses its embedded windows media encoder, though you can try using that separately to get to WMV specifically.
Important thing to remember - conversion settings:
320x240
25 fps
128 bit sound
>otherwise you'll have no joy
If you like youtube - you can convert your saved youtube flash videos (.flv) into mpeg - then sync wia WMP. I wrote a quick guide to it
HERE
if you ever plan on selling it, give me a hoy !
Astro