Disable Mob Spawning, but allow from mob spawners?

Hello,

I'm currently trying to run an RPG server with raids and such.

I'm trying to remove mob spawning in a certain world but allow mob spawning through mob spawners.

So basically, I want to disable natural mob spawning but allow mobs to come out of mob spawners.

Thanks guys and girls!

Please help, any help is appreciated

EDIT by Moderator: merged posts, please use the edit button instead of double posting.

 

I've been looking for one as well and I ran across this. Haven't tested it yet but it looks good.
http://dev.bukkit.org/server-mods/mobsuparemoval/

 

I believe the answer is to set the ticks-per/monster-spawns to 0 in your bukkit.yml file:

ticks-per:
animal-spawns: 400
monster-spawns: 0

I think this allows them to exist - but the game will never try to spawn them itself.