Four people eh...well I think I fill the role of Louis (We're talking about left 4 dead 1 here right, as it may have to be known as for all enternity next week!) as the humble but brave, relatable kind of guy who seems to add nice depth to any zombie film, rather than just seeing fucking Bruce Campbell carve his way through hordes of the undead.
I think I'll choose a guy I know called Bruce to fill the role of Bill, he served in Vietnam, owns two beatiful rifles (My zombie plan has always been to head over to his place anyway) and he can handle himself in tough situations. Also he's really good with technology (So he could build us some kind of SOS radio out of a toaster) and he served as a truck driver so he'd be able to plow through hordes of the shambling undead with ease.
I'd also choose another guy I know called well, Mr Naidu, to fill the role of Francis. He's a young, smart man who's pretty damned agile and skilled, but I think might get kind of cocky in a zompocalyptic situation.
And lastly, to fill the role of Zoey I think I pick...my Sister. By god I think those zombies would rather take a cricket bat to the face (Probably supplied by me) than to face her wrath.
Funnily enough last night I had a zombie type dream. I dreamt that me, the people from left 4 dead 2 and the two guys from zombie land were all thrown together during a zombie apocalypse, but we had a ute full of guns so it was alright.