Remove Side bar for One Page & all subpages?

Hi Stackideas Team

Here is the deal.
I have Moodle in a wrapper here:

http://www.finalbug.net/index.php?option=com_joomdle&view=wrapper&moodle_page_type=course&id=5&Itemid=2087

Inside the Elegant Template.

Sooner or later the side bar on the right hand side takes so much space that the formatting in the middle (Moodle) formatting gets messed up.

My question is there any way that I can:

a) remove the side bar on all course pages
b) have Moodle take up the full width of the page
c) if advisable/preferably do this in the custom css file

thanks

Paul