IPM Templates are independent of templates used with IW Forms. Templates allow you to define a common look for your pages, aka a skin. A template is an .html file that contains at minimum a {%%Doc.Body%%} tag. If no template is specified in the Template Config, Default.tmpl#.html is searched for starting in the directory of the target IWP file.
Templates can be cascaded that is re-embedded into another template. This allows customization of the body of another template without losing or needing to replicate features brought in by another template. To use this feature the following entries need to be made in the Template Config:
[Template]
Parent=Default