I have a directv dish that hasnt been used for about 8 years and its still on my roof and I recently decided to get dish network, so i was wondering if i needed to get a new dish for my roof, a new lnb, or what i needed. I just dont want to have to go onto my roof to change the dish and rewire if i dont have to. I have a dish network reciever, and also a card for it.