I posted some tips about that a while back

isn't hard at all...really easy. I'd rate it a 1 or 2 out of 10. Possibly 2 just because the settlement happiness thing can be a little tricky if you don't know what you're doing.
Edit:
Look inside the second spoiler in this post:
http://www.epforums.org/showthread.p...01#post1833201