absolute positioning problem?

Please forgive my ignorance. I am working on my first Word Press install, and am having trouble integrating look of the current site. I have managed to modify the header and take on the look of the site where it is installed, but the titles, posts and comment pages are “overlaying” the graphics and nav bars on the left. Is this using absolute positioning somewhere, and if so, where do I find it? If I could force the content to the right by about 225 pixels I’d be all set.

Thanks for any input you can provide….