Well... since your here... any help with Rauls quest too? Hes my favorite friend. I couldnt do his quest last time i played either.
You just need to have Raul in your party and then talk to three people (after each, Raul will talk to you and tell you a bit of his story, after the third one the quest will be complete):
Loyal at Nellis Air Force Base
Cpl. Sterling at either Camp McCarran or Camp Forlorn Hope
Ranger Andy at Novac
However, there might be a bug where talking to Andy won't trigger anything (this happens if you've already spoken to him before you revisit him with Raul in tow). If you encounter that problem, there is a way to fix it using console commands (if you're on a PC):
http://fallout.wikia.com/wiki/Raul_Tejada#Workarounds
(look under the heading "Workarounds")