how modify units of secop " template E02: combat "

[zakkandrachoff 10]

Hi. a couple of questions:

version: Arma2 OA 1.54

I want change the units and the weapons in the mission Template E02: Combat ( sec ops, sec op, secop don't know the name ) Now are Germans, I don't want it, i want Us MArines armed whit mk16, mk17, 249saw and all glocks

i can't change in the button "units", this appears blocked, so always i put some ammo cases to change the weapon in the beginning (but the editor is so poor! :eek:).

please if someone know change the units and / or the weapons of secop aleatory mission, please explain to me. thanks. or up the mission and link it;) !