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>>When I first met the man that tells you about his excavation, I said I was just 'passing by'. Now, his partner wants me to kill him and his lackies once I get inside and retrieve the idol. The problem is.. I can't get in because when I talk to the man who I am supposed to kill, he says, "What are you still doing here!?" Can I not get in? I know that if I had been nice to him, I would have entered, but that just didn't suit my character. I tried killing everyone, and entering, but nope.. I waited until night, and talked to him again, but nope.. Do I have to reload my Auto Save in order to get in?

I bumped into this problem. I think you do have to reload - I got bored of messing around and did. Although, I don't think I tried charming him (prob. won't work, but . . . ).

the only way to get in is by doing it the nice way