Heh.. that made me find the "other" solution. From cheese faq:
Thats what i had in mind as second way. You can edit xdg directories with:
Where does cheese store my photos?
Depending on your settings, they are stored in the XDG-directories for photos and videos
However, it says there: "the values are relative pathnames from the home directory".. so i guess you'll have to make a link in your homedirectory if you want to refer to a folder outside your homefolder. And now you'll ask me how, and I'll blush and say:
gksudo gedit /etc/xdg/user-dirs.defaults
Im not sure..
something with "ln".. someone else pls help ?