parasitedotworm , your player's firmware could be extracted for theming and backup purpose, the guide is here
http://www.mympxplayer.org/how-to-ex...tool-vt66.html
Once extracted, keep a copy safely as backup.
Next thing, you can modify the images and text used in the player. The guide is here
http://www.mympxplayer.org/how-to-mo...ool-vt206.html
There are many themes which you can download from the downloads section, or you can create your own. Use the images from these themes or your own, to import into the extracted firmware from your player.
Take note, Do Not use someone else's themed firmware to flash into your player (even if the version is same), as you would likely brick it instead.
Once fully themed to your preference, you can re-flash the newly themed firmware, guide here
http://www.mympxplayer.org/how-to-up...ayer-vt46.html
Happy theming!