There are other sorts of pages that SiteMgr can generate, notably, the page to edit a text file, such as an html file. This page is straightforward, but you should take advantage of the preview function for the file you've edited, to see how it will look before you actually save it, since saving will overwrite the old file without backup. Because SiteMgr can write files on your web site, security is a very important issue. SiteMgr attempts to to anticipate potential attacks and implement strong security measures, but I do not guarantee I have thought of every possible weakness. I probably haven't.
Comments are welcome.
The most important security measure, which can only be implemented by you, not inside the script, is to password protect the directory in which you place SiteMgr. Accessing the script will require a password so only you or authorized users will be able to load the form. See the Mosaic User Authentication Tutorial and the installation instructions below. Do not install SiteMgr if you can't password protect its directory. There are a number of security measures which are implemented in the script.