encrypted? which file is it exactly?

never mind i just discovered i can edit the sockettype to make it a completly free socket for the built in ones. you have to edit the mission_mission0.xml located in the game/levels/class3/levels.pak

http://imgur.com/aTlFtOi

you have to change the variables for bBuiltIn, esFacilityType, fileOverrideFixed, fileOverrideTrashed and s_Variant.

bBuiltIn has to be changed to 0, so that the socket doesnt count as a built in socket.

esFacilityType has to be changed to Any, that way youcan build what you want on that socket (still the restrictions for Indoor/Outdoor Socket are viable)

fileOverrideFixed/Trashed need to be blank so it does not get overridden

s_Variant has also to be blank.

i tested it with the alamo-kitchen as example if anybody can check with another place i would be grateful. is does not change anything if you live in the home site, you have to change to the homesite to see those changes.

Tested and working at Kirkman Residence and the Church. Just be aware that certain installations may glitch through walls etc, for example a Workshop built on the site where a Workshop would normally be at Kirkman's will glitch through the walls of the garage.

with my mod you can keep the original structure but build a munitions shop or mechanics shop at kirkman. You can also downgrade and then upgrade to a munitions shop at the warehouse. No issues with graphics since it keeps the original.
Edit: bah forgot link http://www.nexusmods.com/stateofdecay/mods/41/?