Three Columns To Perfection.

Sup fellas,
I am just beginning to wander into the blogosphere. Today I though I had finally found the perfect word-press theme; Zack 990. I Like everything about this theme except two things and I was wondering if any kind souls could lend a helping hand. I really appreciate the simplistic dynamics of this theme but I want I really want is the exact three column design layout of the website http://www.maestroknows.com which is just gorgeous. Alternatively here is a screenshot of the layout, http://www.republicaapparel.com/three.tiff

Has anyone seen a theme like this? I can a modify an exist theme to do this?
Thank you!