So I'm wanting to give the guards of skyrim a bit of diversity when it comes to guards and Stormcloaks. I have several armor mods that I'm wanting to pull from to give to the guards so that each hold is unique. One major thing I'm wanting to do is take the armor from http://www.nexusmods.com/skyrim/mods/2819/? (just the stormcloak variant) and give it to the Stoarmcloaks and Winterhold guards (because they should technically be the same force) and then take the armor from http://www.nexusmods.com/skyrim/mods/6085/? and give it to the Solitude guards since Solitude is imperial. The other guards I would take different armors from mods like Immersive Armors.

How would I go about doing all of this in the CK?

This will be a private mod ( I may, if I like how it turns out) ask permissions to upload it for others to enjoy.

If I understand correctly you just want to pull some new textures into the CK and use them on existing armors?

http://www.creationkit.com/TextureSet are what you're looking for. Take a look at the vanilla texture sets if you want to know what lines to put the various textures (diffuse, normalmap, etc).

Then open the armoraddons of the armors you wish to edit and change the texture of the meshes.