The skills aren't terrifically different, actually. Sure, firebuilding isn't as much an issue (or as advisable), but sanitation is harder (you always have the one drone who can't get his brain around if we have no power, we have no water, don't flush unless it is critically, eye wateringly bad). Predators are a bigger problem too, but you can adapt. Think of it as being stuck on a rocky desert with some friends, some annoying people, and the middle management weenies who never actually do anything but issue new procolmations and regulations.

You eat them first. <img src="/images/graemlins/grin.gif" alt="" />

But seriously, think about it, what is in a normal PSK or small survival kit that isn't useful anywhere? The fish hooks. Maybe bug repellant. Everythign else works the same way, you just have to think. Although, I don't suggest making a wickup out of the carpet, unless you've already given your notice and have a new job.