AHH HA! beer, my specialty, you will need a regulator to run the Co2 into, this connects the gas to the beer, bout 80 bucks at a beer supply store or restaraunt supply house. then the cheapest way to get a Co2 tank is to find a 20lb bottle that was used for a soda fountain somewhere (lasts about 6-7 kegs) and you will need a tap, you can get one at the same place you find a regulator, drill a hole in the fridge you are gonna use, fit the tap, connect everything and drink away.