i found this vac diabler
:://Vac2Disabler - Powered by ******
But i give you little instruction:
0.5)Close Steam if open
1)go to Start>run
2)typ: %temp%
3)then choose a random .tmp file (Show all maps and files must be enabled)
4)Inject the random .tmp file ( i like to use winject google it)
5)start steam
6)Start MW2 With your hack you like to use
7)tell me if worked bobo