1. Install the game
2. Install the patch
3. Copy your old protect.dll file to a safer place
4. Place the cracked protect.dll into your game dir.
5. Mount the Stalker Clear Sky image , run the game , it will throw the bugtrap error ...
6. Place your old protect.dll back to game dir.
7. Run the game again , and it works ...
Now in 3 days when it will ask for a disk again , just repeat these steps ...
Crack
Game