the only box compatable with sky is a sky box(no hack there,unhackable)if you get a free to air dish you will get many great free channels(with a free to air box,or even a sky box)but no sky unless you pay.good luck.
if you mean sky sports channels no.if you had a second dish pointed at hotbird satellite and patched box(meaning a box with a program in it to allow free viewing of scrambled channels)you would get a fair few channels all be it they are foreign but 3 quarters of what they broadcast is english(movies,as on sky.and sport as on sky sports such as the premiership football,adult viewing.general entertainment channels as sky1,and of course free to air channels too)but like any box that gives free pay tv you wont get any gaurantee that the channels will always work(if you got 3 months or six months free it would have paid for its self)good luck