PLUGIN REQUEST - Zombie Apocalypse

Hello,
I'm looking for a bukkit plugin were you can select a world and make it only spawn zombies.
I've tried 'Monster Apocalypse' but the spawners don't seem to be working. (If you know how to fix it, please let me know.)

Features i'm looking for:
- Select a world (Important)
- Only spawn zombies (Important)
- Zombies run faster
- There attack radius is doubled
- They do not burn in the sun

Thanks.