AppleScript for Dropbox on External HD Disclaimer: I don't know much AppleScript, but I am a bit of a programmer, so you can go a little technical on me.

I am looking for a solution to the issue of putting Dropbox on an external HD.  While they don't advise it, I think that it can be done safely with a couple measures:


Run Dropbox when the hard drive is mounted through AppleScript.  This shouldn't be hard because I read that there is StartOnMount or I can listen for the hard drive's "folder" in /Volumes like here.
Stop Dropbox when the hard drive is ejected, wherein lies the problem.  Is there an event triggered by pushing the eject button that would allow me to run a script before un-mounting?


Either I use the above method or I somehow disable the drive from being unmounted by Mac OS X and mount and un-mount only through AppleScripts (hide it from the Finder's sidebar or, preferably, something better).  Which of those is the easier solution?
I use to have multiple dropbox instances running at once. I think you can put db  app on the drive and use the same trick I did.

HOME=/Volumes/Whereever/you/wanna/go; /Volumes/Whereever/Dropbox.app/Contents/MacOS/Dropbox &amp;


One thing. With this method you change your default $HOME into your new path. So Dropbox will create a folder called Dropbox in that path.