I used to play Counter-strike, and CS source a lot. At a LAN someone behind me yelled out KEYSOR YOU HACKING <insert swear word meaning ladies bits>
Keysor was my mate sitting next to me, the complainer was direct behind us. He sat there and watched him play. I thought sometimes he must hack, but none were on his pc, I couldn't aim like him, and watched him aparently trace people through walls.... on the screen i was looking at there was no invisible walls or pointers for players.
It was skill.
There are cheats out there, but there'll be surprisingly few.
As to wether there's any programs for WGT yet I don't know, but wouldn't be surprised if there is, something that will script your mouseclicks to even just get the accuracy and exact power required.....