I would start by delete the application Menu>Options>Advanced Options>Applications (Find it in the list and be sure it's the right one) menu>Delete
Follow this with a Battery pull and see if you can then work with the phone. After that you might try installing again but might wind up in the same boat.
If you can get it off and back to normal do a backup using the DM just incase this happens again!
Ha! ha! That's right! (not laughing at you but myself) you don't have any Icons to work with, Yikes! If you press Alt + the trackwheel does it give you any options that you can scroll to?