I did an auto scan once, never doing that again! I was hoping to pick ups ome obscure, unknown freqs but was just a waste of a few hours. Don't really recommend unless your in a situation where you are stuck
If you are really stuck and can't find the latest freqs then lyngsat will have the latest updates for you! Those guys are on the ball! Actually i should say that the guys who contact them with the updates are on the ball!
We are pretty sharp here 2 you know
Jestah