Hey I bought a used Halo 3 disc, but it's scratched up and I can't get to a certain level. I was wondering if i were to rent halo 3 and install it to my hard drive, would everything work? I know that installing Halo 3 makes it slower, but I don't really care. I'm asking because I don't want to spend money to rent Halo 3 if it wont work.