Joel930...
To lock the trunk's pull lever, insert your key into the trunk lid, turn it counter-clockwise until the slit is horizontal.
To unlock and have normal operations of the lever again, insert the key and turn clockwise until the slit is vertical.
and as far as I know, there is no way to disable trunk pop from the remote entry. That means when you lock the seats from folding down and lock the trunk pull lever, the only way to open the trunk is via the remote (or use the key to physically do it). This could be annoying if your key is inserted and the engine is on - the car wont take signals from the key fob while in the "ON" position.
hope that helps