It works like a trainer so you have to activate it before starting the game, if you want to try it you can download it here: http://dl.dropbox.com/u/22479350/TRAINER/hitabso_Trainer_s0beit.zip
You can edit all the different options in the cvarlist.txt file. According to what I read you can make it so enemies don't see through your disguise, but still react if you're doing something you're not supposed to by using these variables:
Not sure why it's not working for some of you. I haven't used it myself (just reinstalled Windows and haven't re-downloaded any games). But according to the creator yes it's supposed to disappear when the game starts, and you press F9 to execute the cvar commands. Here's the original topic: http://www.unknowncheats.me/forum/other-games/81413-hitman-absolution-trainer.html
Hey wow this is GREAT! They only get roused if you're right in front of them or they're looking right at you, no more super-eagle-eye, HD-tracking,peripheral vision, soldier bots!
Though I hope someone tweaks with the settings and finds a real nice balance because I get the feeling the game will go the opposite way and become way to easy, but at least it wont be nearly as tedious now.
"If we can hit that bulls-eye, the rest of the dominoes will fall like a house of cards. Checkmate"