Is it possible to have two AI's and OCL's on one tank? so two turrets can fire independently of the main unit? (effectively having three weapons?) If so, can someone PLEASE post some code, lol.... I also want this tank to be able to create units and hold 8 infantry via seperate commandsets, is this all possible on one unit?

It's possible. You put a portable structure, on portable structure, on a vehicle.


Yes... just put them both on the same commandset, or if there are too many buttons, have switching commandsets, like the worker.

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For a vehicle with two turrets, take a look at AmericaVehicleBattleShip.

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i so didnt think about the battleship... also, is it possible to restrict the range of motion on a turret? Because im working on an Elephant from Halo, and the turrets keep firing through the back of it

sadly it's not possible to limit the max turning angles, I've been asking for it as well.
the only way is to make 1 on top of another (aka overlord)

or, just a thought while playing World of Tanks, you could make M3 Lee like design if you wish,
here 
Allow a small aiming delta to the main weapon (via weapon.ini if im right, Ctrl+F it out) to allow little room for TD-like aiming, and give it a turret on top - you could make it make it Anti-anything, and I don't think you'd actually need any portable structures since you have Turret and AltTurret in standard code already 🙂 (Main gun - Turret - no turning / 2nd gun - AltTurret - 360 turn, some pitching? and voila !)
funny how ideas come 2 your head like that ;P

EDIT:
Found it in Pala's defense laser
this means that you allow x aegrees towards 1 of the sides before it (probably launch bone, and turret if weapon slot is assigned to one) has to turn, so if you want it to have a 30 degree freedom, you'd give it a 15 value