This is not a PvP map, it is only the spawn room for the players.
This have one room for each team (blue and red).
Copy the spawn in to your PvP map and customize the way you want.
Use McEdit to import it to your map.

To select where you want to "spawn" you just break a glassblock at the wall and jump in the whater in the "spawn-drop"

Shops
To buy stuff from the shops you only have to drop an item on top of the pressure plate.
You need to wait to the item on the pressure plate to despawn if you want to buy some more.
You are suposed to use whool to buy stuff.
Shear the sheep to get whool.
Only use whool from the sheep with your team`s coullor.

NB: This version dont have any items in the classes or the shops.
There is no spawn-drop-selection
The walls are not complete

Sorry for my bad english