To create a new template set in your web site right click on a folder and select Add New Item. In the Add New Item window select smartDBforms.NET template Web User Control from My Templates section.

This will create an .ascx file that inherits from TemplatesUserControl and that has the needed startup objects for a functional template set - TemplatesControlCenter, LabelHolder, LayoutHolder, TemplateHolder and implementation of the SelectTemplateID method.