RE: Vault City Slaves
I FIGURED IT OUT!!!!
1) Talk to ranger elise in Garage diagonal from Dusty's Cantina
2) Go to slavers outside of NCR in the bazaar
3) Pop caps in each one of their asses
4) Go inside the compound and use LOCKPICK (or press 2) on the computer consoles at the end of each cage unit
4a) Keep doing lockpick until they open.
4b) Free all the slaves
5) Go back to elise and talk to her, she'll make you a ranger, and give you 3000xp + a ranger badge... wear it with pride hehehe