EDIT: Mostly Solved, except for the bit without the strike through lines.
How do you make an NPC follow an NPC? I tried giving a follow package similar to the one used to Follow the player, but instead making the single ref another NPC. The trouble is, the NPC given this AI package follows the player instead.

Better still, how do you make the target an alias instead, as this option is always greyed out.
Either way, anyone know what's going wrong?