Greypox or Pop-Up for Cart

[Commodoreuno]

Hi

I need some help for my shop. I would like to set up a greybox to my shopping cart and login. I use Joomla 1.7 and Virtuemart 2.0.0, the template of mixwebtemplates (mx_joofree6) and the standard modules that were already here (ordered left). Currently the login form is opened and the cart in the same page as the products (although this is a problem, as this page will be displayed incorrectly or in a separate window where the modules disappear on the left). I would prefer a pop-up or a greybox that everything is in its own window, is there a module or do I edit one default.php (and if so which)?What information are still necessary, so someone can help me?

Thank you for the help