This should not take more than 1-5 minutes for an experienced coder.
In the attachment I have outlined what we want to do visually and have included the files.
Basically we want to expand the size of a div from 500px wide to 1000px wide. We still want the 500 to work so you'll need to write new .css instructions for this file.
What we want to end result to look like is included in the attachment. I think its pretty obvious.
You can see the working site here incase you need to pull any images:
[[url removed, login to view]] (Take out the x's)