This utility will allow you to flash a Pioneer DVR drive (or compatible) with a relevant firmware, and to escape the various restrictions set by Pioneer with their UPGDVD flashing tools.

Hardware and firmware for a DSP based digital audio MP3 player with USB pen drive funtionality, using a 16-bit fixed point Texas Instruments TMS320 C55x DSP and CompactFlash card. This is an open source and open hardware MP3 player project.-err