303355715s ago, by Antonio 
+Antonio Noack Ahhh... Yeah after 1.6 they changed the packets
303325554s ago, by LostKey 
+Lost Key I will try to spawn a new player and make him(the old one) invisible... but this would change the skin, too.... so there is no way it seems (because MC takes the skin directly from the name above your head...)
Just use disguiseCraft