Using top navigation menu bar

Other than modifying the center column, you may want to change the way you organize the default blocks in the menu bar (manufacturers, best prices, top seller, and so on). Instead of having it on separate blocks, you may want to have some or all of them in a horizontal menu bar at the top section of the home page.

There is no need to tweak the files to do this, it can be be done quite simply by adding a third party module.