Forgot to include the first Mafia trainer notes along with the invisibility suggestion:
"0. F12 show/hide in-game trainer menu
1. F11 unlimited health
2. F10 unlimited teammate/passenger health
3. F9 unlimited ammo
4. F8 instant kills
5. F7 no damage recorded
6. F6 unlimited fuel
7. F4 unlimited time
8. F3 instant destruction
9. F2 no police
10. 0 always win race
11. 9 1 lap race
12. 1 cycle weapon slot 1
13. 2 cycle weapon slot 2
14. 3 cycle weapon slot 3
15. 4 cycle weapon slot 4
16. 5 cycle weapon slot 5
17. 6 cycle coat weapon
18. 7 cycle item
19. 8 unlimited cash"
This was the best working iteration for the first mafia game 😍
FYI in Mafia 3 you can only carry two weapons at a time.