Script writing for audio game

I am creating a game in the style of zombie running game. It is basically an audio file people listen to while they are running. Each time they go out for a run, they listen to one chapter. The first chapter needs to introduce the characters (the runner needs to be main character). Later on, I will hire somebody to really act out this audio(screen)play. This is an example of the zombie running game script. So you have an idea of the format. Of course, it cannot be a copy. [login to view URL] (page 51) For the theme, I was thinking something along the line of: postapocolyptic setting. Opening scene: -stumbeling noises. People talking about finding things and being in a hurry. And suddenly somebody says "I think this one is alive". "that's not possible". "he must be immune like us, but it seems he has been in a coma". As the story continues. It turn out "the runner" has amnesia (perfect excuse to tell him what is going on), they found him in a hospital and was in a come when "it" happened. It could be a pandemic virus that whiped out 99% of civilization. The storyline could be based very loosely on the bbc series "survivors". I need about 20 chapters. Each chapter, spoken, should last about 15-20 minutes, including noises and acting etc... Let's talk if you are into this!