Always back up your savegames folder before installing mods.
Once installed, use these keys to operate the trainer menu inside the game: : Open or close the trainer menu. Num 8 / Num 2 : Scroll up and down. Num 4 / Num 6 : Navigate left and right in sub-menus. Num 5 : Select or apply an option. Num 0 : Go back to the previous menu. 💡 Pro-Modding Tip gta iv trainer 1.2.0.43
For version 1.2.0.43, the most famous trainer was a modified version of or the "GTA IV Trainer" by Lin Gon . Always back up your savegames folder before installing mods