Im having my 622 upgraded from a 942. Monday morning is my scheduled install date. I was wondering if it was ok to go ahead and unhook my 942 and hookup my 622. Im assuming it will hookup the same way. Im not sure if i will need a new dish outside or not. I live in the kansas city area 66062. Will it be functional if i hook it up early? If not I will just wait till monday.