Sup Spencer42,
Check out the ALiVE wiki and under the OPCOM page, you'll find the following instruction...
"...Additionally, advanced editors can place a location gamelogic of any type on the map and sync it to the OPCOM module(s). Optionally put in init field of the gamelogic:
this setvariable ["size",150]; this setvariable ["priority", 500];
This worked for me.
In the mission editor, under place unit, put down a gamelogic, select "location", then put the above line in activation window. You can change 150 to whatever size you choose. You can change 500 to set the OPCOM priority where 999 is highest, 1 is lowest.
Dont forget to sync the gamelogic to your OPCOM or OPCOMs assuming you want the OPFOR virtual general to know about it.
Hope this helps.