v2
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Awesome new perfect code from jackjr300 on StackOverflow: http://stackoverflow.com/questions/10636511/can-i-use-applescript-to-control-a-program-without-bringing-that-program-to-the/10642451#10642451

v1
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Added Applescript to easily start/stop the current Billings timer.

Use the Alfred Powerpack, Fast Scripts, or a cleverer method (let me know!) to map it to a keyboard shortcut.

If you find a better method for doing this, also please let me know and share your code.