To use:
To set a monster spawner:
Command Method
Look at monster spawner. (Through glass is just fine)
Type in /mbox set <creaturetype>
Command-less Method
Hit monster spawner with a gold sword
Select the new mob that you want it to spawn
To get which monster a spawner spawns:
Command Method
Look at monster spawner. (Through glass is just fine)
Type in /mbox get
Command-less Method
Hit monster spawner with a gold sword
The current mob is at the top of the selection window.