Do you have any links for where you figured out how to fix Skyrim UI elements to work with the ultra wide? I've got 3x1680x1050 in landscape eyefinity and Skyrim is setting the UI as if my monitors are as tall as they are wide so the the words like "Save" etc. in the main menu are hilariously enormous. I fixed that issue in Fallout NV but the same .ini tricks didn't work for Skyrim for me.
http://flawlesswidescreen.org/
I assume you're running that? You must be.