Consider the following mod:

http://www.nexusmods.com/skyrim/mods/10506/?

I want to do exactly that, with Daedric armor. I realize that the pauldrons will likely cause a problem with Daedric armor, so I would likely have to learn how to remove them.. but that's another thread.

So, how would you go about placing these robe objects over the Daedric armor as done in this mod?

Thank you.

A lot of fine-tuning of vertex placement and vertex rigging weights in a modeling program. A good sense on how rigging works is required to not have it clip all over the place. Even then, it's not perfect.

And then you have to ensure that the weight slider functionality works properly too.

Thank you.

Sounds like I'd leave this type of work to the artsy people.