Did anybody figure out how to modify companion behavior or ai packages?

There are 2 things I want to do basically:

1. When you tell companions to wait, I want them to use a sandbox package instead of the holdposition package. All attempts to change that package have been futile thus far. Its almost as if something else is overriding whatever change I made. What could the cause of this be?

I assume that for interiors this hold position package is used: FollowersCompanionCombatHoldPositionInterior [PACK:001E05BA]

According to FO4Edit its using the HoldPosition template as a base. Making it use the Sandbox template instead didnt work. Not even when I replaced all the data with the data of the Sandbox package...

I tried changing the FollowersCompanionPackage too. I wanted the companion to stop roaming around, made the package appear exactly as the standard FollowPlayer package - still no luck. It is as if no changes whatsoever are recognized. Any ideas?

2. I want companions to speak their "idle dialogue" when they are following the player character. Having been used to Skyrim′s Vilja, I feel like I am accompanied by mutes now Are there any flags I would have to set in the package, so they will actually talk their idle lines?

It is currently impossible to modify most companions without side effects. For some reason editing NPC records causes them to lose makeup and other skin effects. Preston Garvey's skin tone changes significantly and Curie loses her makeup, for example.