What everybody said here pretty much covers it but if you want some more reading material I found the info in this thread the most helpful when I changed my wheels. Especially post #33 with the diagram of the jack points.
http://www.1addicts.com/forums/showt...ht=jack&page=2
Like most things you can make a wheel change as complicated or simple as you would like, never the less here are my suggestions.
-When jacking up the rear make sure to use the differential and not the differential cover.
-My favorite tool for swapping wheels is my wheel pin. It makes R2'ing a set of wheels/tires so much easier. No stress on aligning the bolts or scratching a rim.
http://leatherz.com/Merchant5/mercha...etyConvenience
-Unless you have a really low profile jack you will probably need to use a set of blocks to drive the front wheels on to get some extra clearance under the front bumper. I made mine out of gluing an 18" and 30" piece of 2x6 on top of each other.
-I use hockey pucks but I will probably end up getting the jack pads from burger.
-A wheel swap sounds like the perfect excuse to buy a cool tool like a torque wrench.
-If your driveway is sloped maybe a set of wheel chocks? They are less than 5 euro for two at ATU. Maybe overkill but I'm paranoid.
-Maybe buy a rubber mallet if you don't have one. My wheels always seem to get stuck to the hub and I have to hit them from behind with the mallet to get them to cooperate.