Okay, Ive been playing FO:NV for ages now, much like all of you, and was wondering if it is to late to change factions. So I was playing last nigh and thought "You know what? I wanna be in the NCR." but then I wondered if it was too late to join them and I figured it was best to tell you who Im currently sided with, my relatonship with the NCR and how far into the quest I am with my current side.

Im currently working for Mr. House and my relationship with the NCR is neutral. I Im up to part seven in The House Always Wins.

Thanks.

You should have an NCR main quest active regardless of who you are siding with now. Unless you've gone too far into the MQ, the you would have already gotten a new quest that said "If you continue to work against the NCR, they will no longer accept your help"...or sometheing like that. If you've gotten that then you cant ally with them.

Same goes with Caesars Legion.