Have you tried this?
WinamPAQ 1.0 Beta Build 0509
The most famous audio player, now for PPC
If you are one of those users that are used to Winamp when playing audio files on your computer, now you'll be pleased to see this PPC version of Winamp.
WinamPAQ is the name given to this useful audio player that offers you many features that can lead it to be your preferred multimedia player also in your PocketPC.
The interface you'll see when you'll run
WinamPAQ is very similar to the ne you find when you run Winamp, so it perfectly addapts the feeling you are used to have when running it on your PC.
It supports MP3 and WMA, allows you to create playlists, include a 10-band equalizer and is totally skinnable. Enjoy Winamp on the go!
Not sure what resolutions are supported! Let us know your results.