Most Palm applications are more influenced by the level of the operating system than the processor. From what I can remember, though, the m100 was a rather budget PDA - does it have a music capacity ?

If you're in the UK and fancy an upgrade, Linda (Essex Girl) has a m500 (colour screen, SD card etc) which she's interested in selling.

We both use Pocket PC PDAs now (me an iPaq 2210 and Linda an iPaq 1910) there is an exellent free MIDI file player available available for these.