nefordfan,
Upgrade? NO.
Rather than me type the whole long drawn out arguement as to why you shouldn't upgrade your player, you should explore this site and read some of the articles and posts on that very subject.
I can tell you.. (by looking at your firmware type and version) that if you don't like the look of your mp4 players screens you can change them by extracting YOUR firmware, modifying it and uploading it again to your player. In all honesty, thats about the ONLY SAFE upgrade your going to get.
Heres some links:
How to Extract Your Firmware >
http://www.mympxplayer.org/how-to-ex...tool-vt66.html
How to Modify Your Firmware >
http://www.mympxplayer.org/how-to-mo...ool-vt206.html