Oooh bugger. The best thing about doing my back in was the Entonox, which soon had me gibbering like a fool at the poor RRV person. Hope you're back on both feet soon, and in the meantime enjoy the handy upper-body workout that crutches give you every time you need a cup of tea/leak. If the suggestion to learn a human language doesn't grab you might I suggest Wrox's 'Beginning Applescript' if you've not done a lot of programming before? http://www.amazon.com/Beginning-AppleScript-Programmer-Stephen-Kochan/dp/0764574000