The Sky+ works via the TV set which has a Set Top Box Controller (STB-C) built in. This works by translating the message sent to the Beovision into the correct codes for the Sky+ box. It then sends this message via a IR emitter in a long cable which is placed by the IR eye of the Sky box.
If you don't have a B&O set, this is clearly not an option, but you could get a Lintonic box which will act in the same way for all sorts of equipment and will control the Sky box and your non B&O TV if that is what you want.