Unfotunately its not as simple as that.You need Sky to install Sky+ box or a qualified 3rd party, cause you need a dual LNB fitted thus then needs a second feed (cable) run into your house from
the dish, you would once all set up have to get Sky to pair your viewing card to your Sky+ box and get them to activate the recording facility for around £10 a month, Depending what package you are on(SOME PACKAGES ARE FREE RECORDING).Getting them to fit the LNB and run the cable will cost you a service charge.You would have to phone Sky to see what deals they had on at the moment.You could save yourself money by obtaining a sky+ box then fitting a dual LNB and running the cable youself, then getting your card paired and recording activated by phoning Sky. This takes some work and a little knowledge to do, I would not advise you to try this if you have no knowledge or if your dish is not easily accessable or if it is high off the ground.