First of all save a back up of your existing template and the widget data. You may find it help full to read the instruction page for changing template and How to back up.
When you are done. Download this xml file which is archived as a rar file. Save it in your computer. Extract the xml file from the archive. And finally upload your new 5 column template. One thing more, if you are using this template, leave the URL in the comment section. I may put that link here (may be!).Download this template