Trying to modify an npc?

I hope this is the right section.
Anyways, I will admit to having never done modding in gmod, so I need to ask for help. I have a couple npc characters that seem to use the alyx AI, so I was hoping to change the AI for one of the regular characters that can squad up with you, so I can have these npcs follow me around the map and shoot stuff, instead of standing in one place unless I run into them.
Is there a way to do this, and hopefully an easy way?
Thanks in advance.

This should be put in the “Questions” section under “L.U.A Scripting.”

It’s possible this post may be moved anyway, but if you want to save yourself some time you may want to make a new post over there