I recently purchased 4 new tires for my car. I kept the 2 rear tires because they looked still good. My aunt has the same model and year car that these tires originally came off as mine, but her 2 front tires are not as good as the two tires that I took off my car. The tires I took off are Cooper tires, her tires are Goodyear tires. Can I just put my two Cooper ties on her front end of her car being different brand tires? Also with these 2 tires coming off my rear of the car, do I criscross these 2 tires up front, or just move them straight up on the same side of the car as I originally had them on my car?