Most trainers are flagged as "false positives" because they inject code into the game's process.
Enemies will ignore you, allowing for perfect stealth runs. How to Download and Install an IGI 1 Trainer
Use a tool like WinRAR or 7-Zip to extract the trainer into your Project IGI installation folder.
Right-click igi.exe , go to Properties > Compatibility , and set it to Windows XP (Service Pack 3) .