yes free.
right.go buy an extra phone cable that plugs into your box(or use the existing one),strip the wires down to reviel red,black,yellow and green,twist the green and yellow together and the black and red and attach them to a 9v battery,(not quite sure which terminals to use so try swaping them untill u get a result)that u get in smoke alarms,plug it in to the back of ure sky box,go to what ever u wanna watch and put in ure pin number,
hay presto
free pay per view.