Thanks for your quick response, Shewolf13. I'm confused about your answer, though. I believe you can only hack work performance once every 24 hours. Are you saying you started hacking work performance, canceled and hacked something else, and then hacked work performance again?
Edit: I just tried this strategy, and my first attempt was a failure. That doesn't mean that the chances aren't increased, but I'm not off to a good start with it.