Ok, so to select which tasks you want the mission to auto-generate, open notepad on your PC and paste this:
waitUntil {!isNil "ALiVE_STATIC_DATA_LOADED"};
ALIVE_autoGeneratedTasks = ["MilAssault","MilDefence","CivAssault","Assassination","TransportInsertion","DestroyVehicles","DestroyInfantry","SabotageBuilding","InsurgencyPatrol","InsurgencyDestroyAssets","Rescue","CSAR"];
Then, let's say you only want the mission to generate sabatoge building tasks. Make it look like this:
waitUntil {!isNil "ALiVE_STATIC_DATA_LOADED"};
ALIVE_autoGeneratedTasks = ["SabotageBuilding"];
Then save the file naming it staticData.sqf
Now, make a new document in notepad and paste this:
execVM "staticData.sqf";
Save it as init.sqf
Place init.sqf and staticData.sqf and place them in your mission root folder (the place where your mission.sqm file is).
Now, when the tasks auto-generate, it will only generate the sabotage building task (though fair warning, this task can be a bit finicky about which objects it asks you to blow up on some maps. Test it a few times first before having your buddies play).
I realize this is not exactly what you wanted, and doesn't require you to find intel, but you would have set objectives.