Power Locks?

Okay, I have an Alpine alarm. I know it has the keyless entry feature. My car is an LS without power locks or power windows. What would I need to make it lock the doors when I arm it. I don’t really need the switches for the locks. I just want it to lock. Do I only need the acuators? Help me out guys. Thanks.

Yeah I have a Viper alarm and all I did was wire in actuators on both doors with the proper relays. Then everytime I arm/disarm teh doors lock/unlock. It only cost me like 60 bucks.