I am just starting and I would like to know if I get GTA4 if LCPDFR still plays on the computer. I don't really want to have to go out and buy GTA5 when I already have it on my xbox 360. Also what do I need to download to get started. In real life im a firefighter and a captain of a police program. I really just want the basics to just be able to pull people over, run radar, and just do normal police duty's please just help me out.