ross said:
the tires are already on the rims
i dont know much about this, but if i put them on, will they be centered or balanced right so that the car wont vibrate when i drive?
it sounds like you dont know how to change a tire. and that means your a noob! but thats ok, we all have to start somewhere. well, since your putting new wheels with new tires on. make sure they are Balanced. if not, you have to take them somewhere. If you have high performace tires, they could have a directional tred so put them on the right way. they will have an arrow on the side wall if they are directional. you have to torque the lugnuts to a certain pattern. you never go in a clockwise/ counter-clockwise pattern. what you do is tighten the one accross from the first one you have tightened. its always good to use a torque wrench and tightin it down to the specifications because that can prevent rotor warp. but standing on the end of a tire iron works too

here the order to torque
the numbes are your lug nuts. torque in the order i have shown.
.................1......................
...........................................
..........3..........4.................
.........................................
................2.....................
after about a good week or so of driving, its good to go and retighten. you know you did something wrong if in a few weeks, your car starts vibrating. if that happens, just tightin again and check if they where loose.
BTW, one side of the lugnuts is tapered. the tapered side always goes in twords the wheel. this helps center the wheel. dont get them backwords.
maybe one day, you will be able to change your oil!
if you did that, your oil change would only cost you around $7