Another way to do it is to turn the "Off air guides" function off, which will necessitie a new full channel scan.
With "Off Air Guides" turned off, The digital channels will appear in the Channel profile list on their actual channels of transmission instead of remapped via PSIP to be "next to" their analog counterpart, and thus the channels of the analog counterparts can be deselected from the profiles without affecting the digital channels.
However, with the guides off, in addition to digital channels not remapping, you also won't get the off air guide info, Auto Time/Date set, or Station ID via PSIP. This is how I do it though, since my local stations don't send anything of real use via the guides anyhow. Don't know if it affects DirecTV portion of receiver, as I don't use it. Another benefit of having the "off air guides" turned off is that you'll switch between channels/etc. much more quickly.
If you use the method described above, I'm wondering, if you manually tune to say, channel "10", if an analog is broadcasting on 10, and the digital counterpart is on 10-x, will analog 10 find its way back into the profiles?
Thanks