Any idea how to mount and open additional encrypted drives automatically, just like an encrypted /home partition at user login? I asked this ages ago on AskUbun

Any idea how to mount and open additional encrypted drives automatically, just like an encrypted /home partition at user login? I asked this ages ago on AskUbuntu http://askubuntu.com/q/103835 http://askubuntu.com/q/103835 and by the time I got a good answer I'd already moved to a more complex set-up that was incompatible. I'm okay with setting up rsync and grabbing everything I want backed up, then pointing it to a target drive. My issue is having to manually intervene by clicking on the drive (in Nautilus) to mount it - or having to type the password at boot. I'm still looking for a good solution to 'automagically' mount encrypted drives at user login.