Hi, i want to make a car mod. Like full colours, body, etc. anybody knows what program i could use to do that?

As in a 3d model? You have alot of work to do if thats what you mean

Try downloading the trials of either 3D Studio Max, Maya, or Cinema 4D then check out either www.pixel2life.com or www.tutorialized.com and see if you can find any car modelling tutorials, most wont matter what model you want to make, so long as you understand what the tutorials says, and you have the blue prints of the car...

:-)