we removed our directv 18" round dish with dual lnb to put new roof and siding on house. have little knowledge of communications tech but don't wnat to pay for professional reinstall. we are only putting in one dvr reciever, and will not get HD programming. its ok if we can only watch one while recording one channel so i think we won't need two lines. do we need to run the coaxial cable from both the lnb connections or will just one line sufice? also since the unit was unplugged for so long ( we continued to pay for service during remodle just didn't have it hooked up all spring & summer) will we have to call to have the reciever reactivated?