I have given this file my endorsement.
This is a really good mod, needs some work but still very nice. I'd like to suggest a few things, which would make this mod a lot better:
- Released NPC's should be ungagged and get their stuff back automatically a few hours or a day after release. It's a bit weird to go in Anvil and see bunch of women walking around gagged and naked.
- The player should be able to pick NPC's caskets but make it a hard or very hard lock. This would give the thief characters a new strategy and it would also help players with CM companions. I have 5 caskets in Anvil that contain very expensive armor and weapons and it's a bit shame.
- Different variations of the beasts, you can't have too much variety

They would have a bit different appearance, maybe different stats and/or spells, but the main difference would be the pose of the captured character when she is seated.
- Free look when captured, right now it's a bit boring to be captured. Free look and maybe some command panel (custom item?), so you could decide what happens to your character while captured, would make this a lot more interesting.
- As other have said, this would be perfect option to take instead of going to prison. Maybe the guard summons one beast that takes you down immediately and then takes you to the nearest sitting site. Of course there should be more sites, even in wilderness, they could be protected like the one in Nenalata and the character should be ignored by hostiles while crawling.
Even in this state this mod is one of my favorites, keep up the good work