Ya, DirecTV receiver's don't need to have a sub for the guide to work, but they do need to have been sub'd at some point in their life so that the time zone is set. I don't think the guide works on one fresh out of the factory packaging that has never received a hit.
Someone mentioned using an old D or E receiver to get the guide even if it is not subbed.
Another way to get guide is with an old FTA receiver such as Pansat set on dishnet 110 and 119 birds. What is happening to use on the BUD is part of a master plan for Charley and Dave.