Well if that is the case each supporting mod could have a second pk3 with the extra scripting. For FritzBot it would be in the waypoint pk3.
For ETPRO it would be a separate pk3 of the script file, say with the spawn selector stuff nedd3h likes to see.
I don't know
Jaymod but it supposedly does have support. Accordingly Bobot could support it I guess (though it never seems to have script file changes).
No Quarter? Has some ETPRO support but I don't know about the extended map scripting (its wiki is underwhelming).
ETMain - No
ETPUB - doubt it???
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For the The bangalores maybe look at the 2hide map. Allies steal a box (battery albeit a radar parts style) deliver it to a detonator that a few seconds later is enabled. Plunger is actually a func_door that when opened alerts the func_explosive entity and removes the wall brush etc of the bank.