This is not my discovery but it sure does work. use at your own risk . only tested it it with latest version aiw client.
backup your original iw4m1.dll in your installation folder and replace with dll attached. it will downgrade to IW4M1:1.0-166
Disable updates to avoid over writing files and ofcoarse get kingorgys hack enjoy.............
Virus scans
VirusTotal - Free Online Virus, Malware and URL Scanner
iw4m1.dll - Jotti's malware scan