Positioning boxes corner-to-corner using position fixed

[IanMartins]

Hello there. I hope you don't mind a rookie question. Is there a practical way of positioning the four boxes like in the link below, using position fixed? Do I need to find the exact coordinates manually through trial and error, or can I somehow make them line up corner-to-corner through more clever means?

http://img530.imageshack.us/my.php?image=testly4.gif

[joseph_liu]

Make the divs 1px taller than the img and float all divs to the left. Then the 1px overlap will make the divs stop so that they don't float all the way to the left side of the page.