I guess I'll keep plugging away at this, but re-reading what Kinak said makes me think it's probably not going to work. What he said was:
There’s also a new Skill, giving a new option to an old side quest, but it’s so hidden it’s almost an Easter Egg.
I think what Vague-Man means here is that there is a new skill, so-hidden-it's-almost-an-Easter-egg, which, if you have it, gives a new option to an old sidequest. In other words, poking at this old sidequest (probably) isn't going to give the Easter egg skill. Checking old sidequests for new options is the easy part; finding the Easter egg skill first is the tricky bit.