You don't really need to kill those people.. It was a bit hard at first, having nothing but a BB gun, but now I've had more than enough of everything since level 8 or so. 2000+ rounds of 5mm, half a dozen miniguns, 4 flamers, 5 sniper rifles, etc.
I'm still not able to repair things myself, so I must be doing something wrong, though. There's a lot of cash to be made in repairing stuff yourself from supplies in the wild and then reselling it, I expect.
Thrila, I'm pretty sure Farcry 2 is nowhere near as good as Fallout. Fallout's already at least as good as Bioshock, for me. I won't spoil the details of why I think so..