Any more luck on this? Being able to add/remove options (rather than “augment”) them would be awesome, especially if there aren’t enough menu item slots available for “replacements”.
EDIT: Actually in my case (with an almost vanilla Aptio V BIOS on Asrock IMB-X1314), it doesn’t seem possible to use this “replacement” technique. This is because these topmost menu items belong to the “tab bar” that’s selectable only with a “tab” instead of “click” - so when I press Esc I only see “Discard changes and exit”. I’ve tried replacing both Advanced menu items, as well as either of them - in the former case I see only the replacement menu with no way to go back to the original, and in the latter case (when I replace only one of them), it disappears entirely…
EDIT3: I was able to get into an alternative “Exit” menu that has Save/Restore User Defaults items, which reduces the need for me to use this method to edit NVRAM defaults directly. However, it seems I still have to use that method for the menu items that I can’t reach, due to the issue described in my 1st edit (and the fact that my NVRAM is completely locked by ASRock outside of flashing with flashrom, despite BIOS and CFG Locks being disabled).
EDIT4: I ended up replacing 2 topmost menu items that I don’t need for now, which allows me to configure the previously inaccessible settings and save them via BIOS UI as user defaults, and to switch the menu back once everything is configured, by reflashing it. I think this is good enough for now, although I wish there was an easier way.