1px border on edge of header area

Hello,

I am wanting to add a 1px border around the edge of the slideshow area but it is placed on the outsides, instead of right on the edge. Anyone able to help?


There is also a white section between the centre box and the left navigation box. It became white when i set the centre column to be white. Is there a way to make that strip the background colour?

Thanks so much for your help.