Categories ID to display seperatly

I am having some newbie problems/questions. The program & new theme installed perfectly but as far as it doing what I want it to do has been unsuccessful and very time consuming. So if anyone could try to help me out, it would be greatly appreciated.

I am trying to design a site that has 3 columns (one main news column in the middle, left column would be a blog just displaying the title of the blog entry which would open up the full blog page, and the right column is for links).

The trouble I’m having is when I set-up new categories, I want to be able to assign (lets say Main News with ID#2) to show up in the middle column and (Blog with ID#3) show up in my blog nav. bar.

So when I give authors writing access all they would have to do is select “Main News” to show up in the middle column or “Blog” and it would display the blog title on the left which would launch a new window with the full blog.

Sorry if this doesn’t make much sense, let me know and i’ll try to clarify.