I finally got everything working. The dish is really easy to point using a cell phone app. The only difficulty I had (and it was minor) was guessing the right elevation when the MP-1 isn't perfectly level. It was just me being too lazy to level it but it also shows how important being level is.
If you have DirecTV at home, you can count on them screwing up your entire account by adding another, mobile receiver. After a couple hours on the phone with them and 3 different access cards I finally got my D12 SD receiver working.
Here's the secret: when you call them to let them know you need a card for another receiver (I got mine on eBay), do NOT follow the instructions that come with the new card. By using their automated card activation system it will link the new card to your existing receiver(s). Everything will seem okay at first, but within 24 hours your existing receiver will stop working and you'll have to reactivate it with the new card. To avoid this, call DirecTV when you get your new card, speak to a human and ask for their "card activation" unit. Make sure your card is in the new/used receiver and you're getting programming on channel 100. It's smooth sailing after that.