I had Directv from 2004-2007 before swtiching to cable. Now I'm considering switching back to Directv after my cable bill went up again. I still have the old dish on top of my house, and I assume they would need to install a new dish (I didn't have HD the last time I was with them). Will Directv installers be willing to remove the old dish and put the new dish in its place, or will I either have to remove the old dish myself and patch the holes or have 2 dishes on my house? Thanks!