This is how you can crack your GEngine.dll (with version 3.0.0.1672 of Garena ON DEC. 23 UPDATE) to allow maphacks in Warcraft3 games.
1. Open GEngine.dll with a hex editor
2. Go to offset 4E5
3. (please count) From offset 4E5 Up to AND INCLUDING offset 503 set every byte as 90
4. Save the .dll file and please, test it on a noob account first
That's it.
THIS MAY STILL CAUSE YOUR ACCOUNT TO BE BANNED!
It is NOT my fault if your account does get banned because of this crack.