This video will give you an idea of how it actually works, and what I do:
Right now, that guide application is only available for Windows, so I have to boot to Windows XP anytime I want to work. ChaCha is suppose to come out with a Mac OS X and Linux Guide Application this month. I'm looking forward to that. I abhor booting to Windows!
So, if you watched the video, you have a pretty good idea of how ChaCha works. Go ahead, try it out now: