Yes, the hard buttons on the Palm can now be disabled while playing Pocket Tunes music

Well, well, well, it seems I solved my Pocket Tunes hard buttons problem.

After four hours of exhaustive Googling, I found and downloaded a small Palm utility called Hold on, to disable the 5-way navigation buttons on the Palm. When I run it, two giant buttons appear onscreen: HOLD, and Pocket Tunes.

• Press Hold, and the 5-way navigation buttons are blocked. Thus, it's safe to put the device in your pants' pockets. Of course, the Power button still blanks the screen (if the related Pocket Tunes option is checked) so you save a whole lotta battery power.
• Press Pocket Tunes and you'll go to Pocket tunes.

It appears to run in all modern Palm-based devices.

Props to the mad coderz behind this!