Yes if you get world edit set your positions on the same block and do //set skull: playerName its also caps sensitive
I figured out myself how to make player heads, 1.) Make a selection of blocks. 2.) Type //set head;[Playername] ( [Playername] is the name of the player you want ). 3.) If it's good the head will show up. 4.) Put pistons down do get the player head.