That's a cool looking player. There are a lot of good 1.5" themes available, but you'll probably have to build them into your FW yourself.
Follow the instructions here to use s1fwx to extract your FW
http://www.mympxplayer.org/how-to-ex...tool-vt66.html
Then use these instructions to make modifications
http://www.mympxplayer.com/viewtopic.php?t=206
Good luck!
Erik