Such a complicated install for someone sounding like they just started in on this mod install thing.
It is not THAT complicated, all it require is reading the install instructions.
I was told Pluggy HUD is/can be conducive to CTD. My http://www.gamesas.com/index.php?/topic/1119678-kuertees-battle-fatigue-and-injuries-hud-install-confusion/asked how to rename the hud dll since I was not allowed to do so.
That is my understanding too, it even says so in the readme.
Regarding the rename, you just rename it to enable the HUD functions in addition to the normal functions. So no need for what you tried to do by having both installed.
Can't you use OBMM or Wrye Bash to install this mod instead of doing the manual copy/paste (which makes it harder to uninstall)?
Actually I think it is a good idea for people to install their first few mods manually, it will give them a idea of where files go, and more important.... get them used to RTFM.