How do I center everything after removing a column

I have just deleted the moderators column and almost have my forum like I want. However, I cannot seem to figure out how to increase column span of the table below the catagory bars to be parrallel with with the catagorys. I can increase the catagorys or decrease them but I cannot do that to the ones under catagorys. I can get the catagorys the same size as the ones under it but then it is off centered on the main page. Please help - thx in advance.