Mr Justin McElroy, resident funny man over at Joystiq.com, has written up a very handy post
which guides you through setting up themes on your PSP. In five easy steps (all ending in exclamation marks!) you will learn to download, install and then, finally, remove one of the two offending themes currently available. With more themes available in the near future
, however, this is a skill you need to learn. Like driving, except you can do it while drunk.