I think everyone calls it a banner?
 

Well, if thats what you call that picture under which I am now typing.I have a picture, but not no internet provider or something.In the last forum we just had to upload it.Different here.Anyone help.

If you have the pic and you just need it to be hosted, you should find a free webspace service. There are several of them around. I think in some other thread here in Help & FAQ somebody posted links to some of these services that let you have a free webspace to upload your files. Check the other threads. Otherwise, maybe there's some member who can upload the pic for you, but it's better to have your own little space, in case you want to change the image later.

I am trying angelfire now, and seeing if that works.

Nope, Angelfire never works for external linking.

I can host it, if you need it, but as Carlito said, it's obvious that everytime you want to change the banner, you will have to ask.
Anyway, if you have the image you want to put in your signature, send it to my email address and I'll upload it ASAP.