Etalyc, the first two responses/solutions i think is your best bet.
I do not know of any way to edit the registry in order to delete that text box you speak of. Your best bet is to use a utility as mentioned above in the first two responses.
Trust me man, once you make the text box transparent, you'll hardly notice the text. I use a different utility to accomplish the same thing and depending up on the wallpaper i use, sometimes, i barely notice the text.