Amigajoe,
this is the guide to extracting your firmware >
http://www.mympxplayer.org/how-to-ex...tool-vt66.html
Note that only fw versions 9.0.43 and lower can be extracted from an mp4 player. Versions above that eg: 9.0.48, 9.0.50 etc can't be extracted correctly using this method. These versions are usually only obtainable from the manufacturer.