There are Pay N Sprays in GTA IV, but they will only change the colour of a vehicle. There is no equivalent of Transfender, as in GTA San Andreas.
There is no such thing as a Hover Car for GTA IV. It could be a mod or someone has told you false information.
The bodyguard is a Mod that has to be downloaded
No, there is not a Ford Mustang in GTA IV. You can mod your car using a computer to get a Mustang but otherwise there is not a Mustang in GTA IV.
This site seems to have a tutorial. See if this will help:www.gtagaming.com/downloads/installation-help
Modding on the GTA IV means adding or editing things within the game. This is illegal.
Ratman does not exist in GTA IV, it is a myth. I do not know whether a mod has been created for him, sorry.
There is nowhere in GTA IV that you can purchase a vehicle.
Vehicle mod is modifying the appearance and handling of the vehicles you see and use in GTA IV. You can for example switch the banshee with a BMW Z4 or the Blista with a GOLF GTI :) Greetings
Apparently the Infernus in GTA IV is based on the Lamborghini Murcielago / Pagani Zonda.
Yeah because i got some o gta IV
you can't get in planes in GTAIV but you can get in helicopters, the same way you would get in a car.
If you are talking about LCPD:FR or Police Pursuit Mod, then no. The Xbox 360 and PS3 are unmoddable. If you'd like to be a Police Officer in GTA IV then buy the PC version. :-)