Come on, both calls I made to MS tech support were delightful for me. That will probably your only and best bet to get this sorted out.
Handicrap's forum posts
Personally, I hope the crab walking and kung fu flips don't make a return. Other than that people can exploit whatever they want.
Does the steam version of Max Payne 2 comes with a launcher? When you start the game, it brings up a window where you can choose the mod you want and change video settings.
To install the mod just unrar the download to your Max Payne 2 folder.