I think you may be very much misunderstanding what all of these things are. I might suggest you have a look at this FAQ and all of the labels in the image so you're clear on what each section is.
http://www.wowinterface.com/forums/s...ad.php?t=21108
There is only *1* cooldown bar. Player buffs are only in one location and have never been next to the health bars. etc. I think after you look at the image and labels, you'll begin to see.
All of that said, the player and pet buffs, and target debuffs are defined in the
["Aura"] section of the corresponding [
World of Warcraft > Interface > AddOns > nUI > Layouts > Default > UnitPanels > {panel mode} > nUI_UnitSkin_{panel mode}{unit}.lua ] files.