Taking me a little bit of time because of the high resolutions I'm using show any mistakes I make in the photoediting process...
But rest assured that they're gonna look nice. Everything from text to logos (even the offical "Star Wars" logo) are done in vector format, so the lines stay crisp. In fact I think there's only 3 bitmaps for each cover... front picture, back picture and the obligatory screencap. The nice thing about this is that I can just go into my masters and retype a few lines and PRESTO! A new set of covers for any version of the transfers you're using. Speaking of which... who's version did you need covers for?
Other than a good hi-res pic for the Jedi back cover, there's really not much left to do other than some basic text formatting and a good once over with the ol' spellchecker.