Linking from side menu to a category

[gofer123]

Hi all & happy New Year
Tried searching for an answer but find the right solution.
In my VM 2.0 Joomla 2.5 site I have a VM Category menu module inserted in the left hand column and I want to be able to click on "Prom Ball Gowns", which is one of several categories I've setup, and that would take me to that category page displaying an image about the same size as the home page.
Very new to VM so I need some step by steps please.
Cheers
This is the temp site; http://www.elandesigndev.co.nz/sapphire/index.php/home