I've just started running an external Dell 1908fp monitor alongside my Powerbook. I've managed to set up the external monitor as the main monitor (dragging the menu bar in System Preferences > DIsplays > Arrangement from the laptop screen to the new monitor). I've also managed to assign my Wacom Graphire 4 tablet to the new screen (System Preferences > Pen Tablet >Tracking : Pen Mode - Details > Screen Area: Monitor - 1). Is there anyway I can assign either a keyboard shortcut - or, better still, one of my custom Wacom buttons, to let me toggle the tablet between one screen and another?

I've heard Automator's good at this sort of thing, but can't for the life of me work out how it works...