09-18-2012, 12:11 AM
The server's inventory should be fully exposed to plugins, you can set anything as slot #5 (helmet slot) and it should be used by the client. You might want to test rigorously, though, if it doesn't make the clients crash or some other unexpected behavior.
Or you can simply edit the player JSON file if you just want to experiment.
Or you can simply edit the player JSON file if you just want to experiment.