Changing my serpentine belt

Really the main difference on newer cars is just that they have an automatic tensioner so there is no tightening involved. You need to use a socket and ratchet (they also sell a special tool that is just for this job at most auto parts stores) and use them to take the tension off of the tensioner pulley. There should be a belt diagram somewhere under the hood that you can use to route the new belt. Then just use the ratchet and socket on the tensioner bolt to re-rension the tensioner so you can slip the belt on.