thenorthstar , your player would be using the v9.xx firmwares here
http://www.mympxplayer.org/actions-9...ware-dc37.html
As there is no way of telling which firmware would work with your player, you'll need to try all of those for your screen size until you get a working one.
You might also end up with no available firmware, as the extraction tool currently does not support any versions above v9.0.43.