The rrWebsite is based on preset files.
They are located in \resource_deliver\sub\cfg_website_templates.
Although it is named "Website", it does not mean you have to use .html files.
You can write presets for .xml files or anything else. It does not even have to be a text file, it can be a binary file.
The less files and the smaller the better.
As the rrServer updates the job sites very frequently has to do a search and replace every time.