Download Img tool V2. If you have GTA_SA v2, use downgrader patch in order to use mods.
After downloading IMG Tool V2. Open it up and open up "C:/Rockstar Games/ Grand Theft Auto SA/ Models/ GTA3.
Press F2 to open up "Find" in IMG Tool.
Put in "Hunter.TXD" Right Click on Hunter.TXD and press "Extract" (Back up) it to a folder.
After Extracting, Right Click again, press "delete." Now press CTRL+A or "Add" to add the "Hunter.TXD" FROM the MOD FOLDER. When added, press "Rebuild Archieve" and wait till it raches 100% 
MAY TAKE 2-4 Minutes.
