This is a tango'd theme and 'while playing' screen (WPS) for Rockbox 3.01. To install:
Simply extract the folders from the .zip into your .rockbox folder. (and allow it to overwrite the folders it complains about) To use:
Settings > Theme Settings > Browse Themes and then pick 'tango'. It will apply both the theme and the WPS automatically.
This theme is heavily inspired (some might say directly lifted from) Frisley Velasquez, who uploaded this theme to the rockbox WPS gallery. His theme was for the nano (and can be found here
.) and wasn't licensed CC-SA-3.0 (as is required by the rockbox community.) As a result of this, the theme was put into the graveyard. So I've decided to release my personal mod of this theme, wherein I've greatly expanded upon the ideas in the original style and WPS and changed some things to fit the larger iPod screens (as well as my taste.)
I hope you like it. If you need any help setting up Rockbox, I don't pretend to be a master - but I'll be more than willing to help. Edit:
Forgot to mention - if you have cover art, it has to match the specs mentioned here