All the CSS specific wrapper hack does is allow you to have the tablewrappers change with each style. If you have stylesheets now that do not have wrappers they will have the empty boxes.
Now if your wrappers have the boxes your problem is that your spacer.gif is not set right in your tbopen and tbclose templates. In Dalantech's mod he you need to edit the path to spacer.gif where you uploaded it to your server in those files. However if you look at the file you uploaded he named it space.gif not spacer.gif so rename it if thats your problem
