The TextSide Engine can always server traditional HTML pages and other content. For example, old sites, static content, or other PHP based programs (such as forums).
To serve regular content, simply place it in the folder:
site\webroot
Any file found in the WebRoot folder will override any file that you place the site\control folder.
Files served from the WebRoot folder work completely outside of the TextSide Engine. When files are found in this way they are served without even starting the Engine. As a result, if you do place PHP files in the the WebRoot folder they will not have access to any Engine global values or the pre-established MySQL connection.