Jindl

This has probably been asked and answered before, but from a quick search of the boards, there wasn't a obvious answer.
I would like to have manapercentage show on my player window and exp percentage show in in inventory window.

I know XML well enough to understand the changes to the files, but from a standard usage point of view, what should I do: Just edit the existing files and then reedit them every time a patch changes them or copy them someplace else and make my own UI?

__________________
Jindl