We didn't talk aobut modifying the files, if you want to go there add this to every power/mana progress bar in the interface:
Color="#FF0000" DynamicDataFilter="FBFF"
For the DynamicDataFilter the bolded letter part is important, some bars may already have a filter, in that case just make sure that the second letter is a B. And probably all of them already have a Color tag, so just modify it.