blaster83 , your player would be using the v3.5.xx firmwares.
v3.5.35 here
http://www.mympxplayer.org/actions-3535-dc15.html
v3.5.37 here
http://www.mympxplayer.org/actions-3537-dc16.html
As there is no way of telling which firmware would work with your player, you'll need to try all of them (for your screen size) until you get a working one.
Once a suitable firmware is flashed, the player would appear as a removable drive in explorer.
There are quite a number of them, so good luck.