You need to be using a computer if not then you cant
No... It is GTA 4!
The only game in the GTA IV series that has a mission replay mechanism is The Ballad Of Gay Tony. This can be accessed through Luis' mobile phone, with the option"Missions". This is not available in the main GTA IV game or The Lost & Damned.
no
No.
890-453-9655 is the cheat of nitro in GTA iv PS3.
You cannot, GTA SA has a much lower graphic system then GTA IV, plus the cars in GTA IV have more addons than GTA SA.
No,you can only do so in gta IV or gta SA
There is no cheat for the MG-42 in GTA IV. I assume you saw a youtube video showing one of them in GTA IV. What you saw was a new weapon model modded into the game. This can only be done on the PC version of GTA IV. If you want to know more, just google: "GTA IV MG42"
No
At gamespot.com
You can't.
no