I own a server and am not a noob to plugins, but have no idea how to make one. On a server i like to play on there is something that lets you craft a spawner with a spawn egg and 8 iron bars. i do not know if this is a plugin or a modification to the craftbukkit.jar file, but if it is a plugin, i think it is personal (i may be proved wrong), so i was hoping someone could create a plugin that when you mined a mob spawner it would drop 8 iron bars and a spawn egg of that type of spawner, and could be crafted back into that spawner with the iron bars and a spawn egg. please tell me if this is possible, or if it is in another plugin in the comments.
http://dev.bukkit.org/server-mods/supersimplespawners/ Try this one. It doesn't allow you to craft or get iron blocks but it allows you and your players to mine and place blocks. Of course depending on how you setup the permissions.
