Hitman: Absolution Cheats
Yes the point and shoot using Crtl n Q works. But that's really the only way to get a good score in that bit. I nearly had 800 or you are insanely great at shooting.
It might be a bit harder to do but there is a way to do it without doing the competition at all. The key to the case in a safe in the owners room. If you would like more details I could pm you how to do it.
Look around a good bit, there are a ton of things to distract guards with and you can jack them if you would rather do that than shoot for them.