To install the downloaded template it's necessary to follow these instructions:
run the EXE file you downloaded from Internet related to the chosen template;
enter the destination folder so that it will be the same as the one in our website. This folder is automatically showed as the default one in the installation software;
unzip the files by pressing the Unzip button
launch WebSite X5 and open the IWP project file you find in the folder you unzipped.
Templates are always unzipped into the folder named C:\TemplatesX5, into a sub-folder that has the same name as the template you chose.