Download the Picasa Webalbum without installing picasa.

1. Add the Download Them All addon under firefox.
2. Restart the Firefox.
3. Open the album that you want to download.
4. Click on the RSS link on the right side of the Web album pane.
5. Right click the page and say Download them all. ( That's it !) you might have to specify the directory if it the first time.

-- Mihir Patel.