rolling shutter help - needed

I've got a short bit of video shot on what looks like a phone for an announcement in my church this Sunday. It wobbles like jelly, which I'm guessing is rolling shutter problem. The piece can't be redone in time and we'd really like to use it.
MY problem is that I don't know how to begin to use the HF2 rolling shutter correction effect. Can anyone give me some starters - I found the help files not sufficiently helpful for my ignorance level!
Thanks in anticipation,
Fergus