1) EDIT: asked and answered

2) I need to change the Player's face to be green. I managed to change the rest of his body to be green, but any attempt I make to change the face meets with Skyrim's stubborn insistence that the Nameless One is indeed an Aryan fellow regardless of what the rest of his body would seem to indicate. I understand that I need to make a "master file" to handle this, but I don't know how to actually reference the face to the body once I make the master file. Hmmm...

3) Eventually I need to implement a DnD style magic system, and I'm having trouble thinking of how to do it. If anyone has some ideas they'd like to share, cool.

NPCs can have as many AI packages as you want...but only the first one whose conditions are met will be used, going from the top down in the AI package stack. To have multiple forcegreet packages, you'll want to give them conditions that make them mutually exclusive, and make them so they all fail when you don't want the NPC to forcegreet so it will use it's other AI packages instead. And also make sure that the Forcegreet packages are all ABOVE any nonconditional packages like sandboxing, travel, etc.

Yeah, I got that working eventually. Sorry I didn't edit fast enough.