I know i'm dragging this post from the dead, but i managed to do the same thing, now I only have the launch browser text.
I was using sk tools and I think it deleted the wrong registry setting.
EDIT: I have fixed the problem
SK tools had deleted a manilla file which I found by searching for 'banner'
i think it was in hklm\software\htc\manila
However, I have found an option for internet banner image in the registry and the string links to a folder i cannot find using resco explorer