Gaaaaaah.... I think I actually HATE Picasa. Really, really hate it. As a desktop image file management system, it sucks dead donkey dick. It pretty much ignores the existing file system in favour of its own arcane cataloguing system, and if it decides not to display a folder... well, good luck ever adding it until it mysteriously decides, at some future time, that you're worthy to have access to it. Or not, as the case may be.