Does your freeview box have an RF output? If so connect that to the Satellite Receiver RF input.
Mind you you'll get a better picture if you use scart leads.
I had aletter some 3 mths ago saying I was entitled to a free satnav as we go digital in march, I recived a date he came fitt a new arial, freeview box tuned the tv, and set up the tele in our spare room in less than an hour and went, polite, and professional. most impressed.