Humm, I haven't seen a 'suspect' MP3 song crashing an mp4 player before though........
The "removing memory hack" is also a good way of formatting your player too in case there are corruptions in the file system in the player's memory.
Try this as well:
http://www.mympxplayer.org/how-to-pe...rs-vt5595.html
Is it always the SAME mp3 songs that crash and restarts your player?