[development] Translate one button in photos module

Hi there! I'm translating the photos module, by the way, the only one string that I can't translate is the button of the "Upload" images, because the button is make it in Flash. The question is: Where can I find the string? I did find it in all the files in the photos, ajax, upload and include path, but I can't find it. Please help me, where can I find it? Thanks a lot. Regards. Gustavo.-