Installation instructions?

[Robert]

There are no installation instructions contained within the zip file
for the beta version, phpSitemapNG-1.5.4b.zip.  After reading the
other help messages on the forum, apparently creating an "admin"
directory for the files and subfolders is required.

(One 3rd party website recommends installing the files
in the root directory and then password-protecting the root dir,
but that can't be correct or sensible.)

My question is...  Since the only file that references an /admin/
directory is settings.inc.php. I am wondering whether or not
installation can be achieved by:

1.  Simply creating a password-protected directory on the server.
2.  Replacing the /admin/ in the line
    $SETTINGS[PSNG_DISALLOW_DIR][] = "/admin/";
    with whatever directory name is preferred in Step 1 above.
and
3.  Running the script(s) from there
?

If not, where might I locate a readme file or other installation
instructions?

Thanks.