Spent a few minutes and got Extplorer working good with MC.
Just go into the overrides directory, create a com_extplorer directory, add a file a called override.css.php and add the following code:
<?php header("Content-type: text/css");
//this sets up the colors for the core missioncontrol template
//require('../../css/color-vars.php');
?>
.mc-frame, div#mc-body {display:none;}