Ok so im going though the game agian in 2 profiles one for ceaser and the other for the ncr.I'm just kind of zipping though it because i like my other profile better with the power armor lol.Anyways i was doing the king's gambit mission and i firgure i just go to sliver rush and sell some stuff.i go in and forgot i had to wait there and now they hate me lol.I'm only level 12 so gun runners dose not really have much for me yet but i was seeing what do you guys think be the best way for me and boone just to take em on because whenever i try i just start getting bashed right when i walk in lol.

That sounds like a tough one... Maybe try popping a stealthboy and then laying out a bunch of C4 at their feet, then exit, blow it up, and return to mop up the remains. Better yet: if you're just after the stash of guns they've got laid out: pop a stealthboy, swipe the guns, leave. then come back later when you're uber stong and wipe them out. (careful not to run out of stealthboy before you're done stealing though! i needed two)

Do you have an earlier save from not too far back that you could load from?

Auto save should work, unless over ridden.

do a long save when you enter buildings. the same thing happen to me which is why i save the game before entering buildings.