hugozc,

Switch to the classic template and see if you still have the issue
Will have to load the 2 files to the respective classic folders also

Also, will this mod also add a columnar display for "ALL Products", "New Products" and all othe product listings? If so, then how do i configure the settings to do it to all pages? if not, then i will greatly appreciate any references and/or links to mods that will do columnar display on these other pages.
No it is not designed to do this as it is only for the product listing display.

By default, ZenCart has 4 different displays
There is a long thread that outlines what to alter to have one listing display type

http://www.zen-cart.com/forum/showth...single+display