In the General Edit it says:
"Open TES5Edit.
Select all the Bethesda ESMs then click [OK].
Expand "Worldspace" under Dragonborn.esm and select the "0000003C" node.
Right-click the column for Dragonborn.esm and select "Copy as override into...".
Select "" and click [OK]. In the resulting text box type "General Patch"...."
I selected the Skyrim ESM along with the DLC ESM and followed the instructions above, whereupon it says it needs to add Skyrim.esm as a master and asks if I wish to continue. I presume I am supposed to say yes here. Or was I never supposed to check the Skyrim ESM when launching TES5Edit? It does not ask a similar question about the "00000D74" process, perhaps because I have already accepted Skyrim ESM as a master.
PS - if you find it tedious when I note or ask about things I find odd as I go through the process let me know.