oUF Phanx modifications, new to lua

[ampere]

Hi, I was looking for some help at modifying the code for the addon oUF Phanx (found here). I am not particularly familiar with lua editing, the extent of what I have done in the past is editing the Yorsahj raid warnings addon to say the messages I wanted.

A summary of the things I wanted to change so that people can advise me better:

Add a threat percentage attached to the target frame (similar to the optional one on standard Blizzard frames).
When out of combat, display all buffs such as mounts, costumes, etc on the target frame.

I understand why the addon author chose to not include certain features, but I really like the basic set up of the addon and just want to make a few modifications so that it works for me.

Any advice or tips are much appreciated, thanks.

edit: Suppose I should also mention that I would like to change some of the buffs/debuffs that display for certain classes while in combat.