I believe the setting is a combination of alwaysGetBreakfast, getBreakfast, and getBreakfast.name (lowercase character name, so on a character named Theraze, getBreakfast.theraze). They're all found in GLOBAL_PREFS, not specific prefs for the different accounts...
From looking at the source, it seems if you run a captured CLI_EXECUTE("breakfast"), that should run the BreakfastManager.getBreakfast command, with full execution set. Toaster, Rumpus, VIP, Guild Manual, Crimbo toys, Hermit clovers, harvesting garden, Big Island, Volcano Island, mana restoration (if set), cast skills, cast book skills, and then set/fail breakfastCompleted.
Easiest way to do this would be completely disabling automatic breakfast execution, and just running a captured 'breakfast' command as part of your login script... Could even run it multiple times if you wanted to, depending on which clan you're in, etc.