Categories to display in box in main page

[peuge]

Is it possible for when I click on one of my categories in the left hand infobox for the subcategories to be displayed in a box on the main page. Right now all that is happening is they are being displayed in the main page. The reason I want to do this is because I want a different background color. If I am not making myself clear check out www.prophecy.co.za and what they have. If you click on one of their categories then that categories stuff is displayed in a box in their main page.

Thanks

[peuge]

So I have done more research, and still cannot find a definitive answer. But incase the above post was misleading I think I might be able to explain myself better. I want to add a module like the new_products but instead I want it to display the current category as the heading and the subcategories as the contents.