I reflashed with a kitchen theme - it was only the circle battery mod but its all the same process. Go into the website, make a few decisions, tick a few boxes and then wait for your zip file to be cooked. 2.3 framework is on there so no need to do anything yourself really.
Flash it like you would a rom.
Alternatively, look at the themes on the LeeDroid wiki page (linked on the initial xda post) and there are a couple there.... Blue Sense etc that are quite cool.