Jarmo: Well who could dislike Lovable Lynette? :O
I was a bit disappointed in failing to resolve the ghoul situation to her liking.
(is that even possible, probably not)
Killing the ghouls and/or melting the reactor is "to her liking." Any other solution gets (at best) a neutral reaction from her. I always found it very interesting that her hatred of the ghouls was so great that even when they provided valuable power to them, she'd still kick you out of town if she found out. The "best" solution is to fix the reactor, optimize it, talk to McClure, and just tell Lynette you "solved the problem" without going into any details.*
*However, due to a bug, you'll still get the Invaded by Vault City ending instead of the Gecko-Vault City Alliance ending unless you've installed the killap fixpatch from NMA.