This will require a few different steps. The first is to add new widget areas using the ‘Widgets’ option from the drop-down menu on the Skin Editor page. After adding the new widget areas, give each of them a unique class name.
Once you have the new widget areas with custom class names, you can add custom CSS to create a width (should be around 30% or so) for each widget area, in your case, the CSS from the 3-column footer widgets will work.
Also be sure to add the CSS for responsiveness to the ‘@media’ section of the Criss Cross skin CSS file.
Let me know if this makes sense or if you need further instruction.