Go to your gta V main directory and copy and paste the 5  given files: dinput8.dll > GTA V Ufuse 4X4 Trainer PC V1.1.asi > GTA V Ufuse 4X4 Trainer PC V1.1.ini > GTAVTRAINERCHECKERUP.SFV > ScriptHookV.dll

Press the "F4" key to open the menu and use the numpad keys to navigate and choose things. 
Numpad8 = UP
Numpad2 = DOWN
Numpad4 = LEFT
Numpad6 = RIGHT
Numpad5 = SELECT/ENTER
You can change the hotkey to open the menu by editing the .ini file with a any desired key from: 
https://msdn.microsoft.com/en-us/library/windows/desktop/dd375731%28v=vs.85%29.aspx 

Updates: 
. Beta 1
- Added Minigames BETA (Zombie Generator, Clown Generator, Dog Attack, Alien Generator). 
- Added Max Upgrades for Vehicles. 
- Added Mobile Radio. 
- Fixed Player Model naming and rearranged menu a little bit. 

V1.1
- Fixed Player Options. 
- Fixed World Options.
- Added Notifications. 
- Added .ini file for custom menu hotkey. 
- Added toggle for Minigames (Still needs to be fixed)
- Fixed some vehicle glitches. 
Note: Toggle a generator ON for only 3-4 seconds then stop or else it will keep spawning and your game will crash.