I managed to install files by dragging them to applet. It just worked. However, it's rather difficult to discover this way of installing files. I think that applet's popup should say not 'Ready to synchronize', but 'Ready to synchronize. Drag files on this icon to install.' This will easily educate users.
-- There is no way to install .pdb .prc files https://launchpad.net/bugs/74703 -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs