Help!

I've managed to slowly begin restoring all the scans that I inadvertently wiped out, due to my little "organization" a short while ago. I understand the principal behind the addresses changing at photobucket. I even managed to get my icon back, but the life of me, I can't figure out how to restore my banner at the top of my blog. I have the picture itself, with its new photobucket address, but when I went to erase the old address and type in the new one, I was afraid that I'd blow up the whole shebang.

Is there a process for this? Can anyone explain in small words for a technology-deficient old lady?

I miss Hal's butt.