To add the SA programming you want to call 1-800-SKY-ANGEL. This is a separate company that provides their programming on the same system as Dish Network. It is completely seamless on the receivers, and the billing is handled though Dish, but the programming is activated via Sky Angel, not Dish.
However, as others mentioned here, you have to have a Dish aimed at 61.5. If you have a Superdish, you will need a DP44 and a Dish 300 to integrate the whole system.
See ya
Tony