http://s1167.photobucket.com/user/BrandonTr3/media/zombies_zpse2rkvtrh.png.html
Above is the link to gve you an idea.
I'm almost at finishing point of my map and what i want to know is. For different areas of the map im making like the one below where the zombies are, do i still copy and paste those conncted zombies to different parts of the map and have them connected to the point it's at (my spawn) or does different areas of the map have to have different points where they connect?

i'm not entirely sure what you're question is, but i think you need to look up some stuff about adding zone's / spawners like this for example:

https://www.youtube.com/watch?v=K5xdKWhRp_Q