*/
	private void setCommands( Displayable disp) {    	disp.addCommand( this.displayInfoCmd );    	disp.addCommand( this.soundInfoCmd );    	disp.addCommand( this.systemInfoCmd );    	disp.addCommand( this.gameControlsInfoCmd );    	disp.addCommand( this.arithmeticBenchmarkCmd );    	disp.addCommand( this.creditsCmd );    	if (disp == this.mainMenu) {        	disp.addCommand( this.exitCmd );    	} else {    		disp.addCommand( this.backCmd );    	}    	disp.setCommandListener( this );	}