Unfortunately, I'm vilified in the Legion, so I wasn't able to do any quests for them (except for the one given in Nipton (Cold, Cold Heart)). Sometimes when I look at reputation in my Pip-Boy some entries are gone and looking at the map I see Neutral standing with those factions, but as soon as I talk to an NPC the reputation is reverted to the original state (this may actually be a glitch in the game). Is there a way to finish Legion quests if they hate me? Furthermore - is it possible to finish side quests for both NCR and Ceasar's Legion if they hate each other so much?