It's another one of the "wonderful" proboards issues. I would try sizing it small enough to fit, then uploading to a third party site like imageshack or photobucket. Then you need to copy/paste in the html, and i think the drop box needs to say "custom" or something like that. i haven't done it in literally years though, so memory might be off.
Falcon Boy Apprentice Falconry Administrator
Ethics make the individual, not the other way around.