Check out this post of mine in the Skyrim Revisited section. It talks about this very thing!
Basically, what you're doing is saving the new textures into a BSA file, which isn't what you're supposed to do. You're meant to be left with loose files in the directories you create.
Check out my thread; I posted what I think the directions should say, and I think they'll help you!
I believe the problem with your carry weight stems from the Character Creation Overhaul. I use that mod too, and I've noticed that it changes carry weights a lot, and often times I end up with a very low, or even negative carry weight. Surely it's a conflict between that mod and another, but I've never been able to narrow it down. I always just adjust my carry weight permanently via the Console. The command is: player.setav carryweight #### (input your custom value where the #s are). Hope that helps!
AddictedxGamer's post in Optimizing DLC confusion, Neovalen guide was marked as the answer