modify the mod_wimpy.php to say this instead of the existing code:
<?php
//=====================================================================================
// Created for Mambo 4.5.x by GTEK
// URL: http://www.gotgtek.com
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// The "GNU General Public License" (GPL) is available at
// http://www.gnu.org/copyleft/gpl.html.
//=====================================================================================
defined( '_VALID_MOS' ) or die( 'Direct Access to this location is not allowed.' );
?>
<a href="http://www.XXXX.com/wimpy/" onClick="start_stetting=window.open('http://www.XXXX.com/wimpy/MyWimpy.html','',
'toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars=0,resizable=0,
width=300,height=300,left=30,top=20'); return false;"><FONT style="BACKGROUND-COLOR: #FFFFFF" color=#FFFFFF
size=1><STRONG><img src="http://www.XXXX.com/wimpy/wimpy.png"
width="112" height="38" border="0"></STRONG></FONT></a>
Keep in mind you will need to adjust the Height and width. then just change the picture location and the wimpy location. This way it will just make it a popup. If you do not want to use this method then you will need create a frame and that can open a new can of worms.
Unfornt. you cannot cache wimpy when a page reloads because of the code that is running in the background. And I also didnt make Wimpy. Just the module