Actually there's a better way. In the setting in the admin server just it to index. There with a text editor go into /etc/httpd/httpd.conf and edit lines like:
AddType application/x-httpd-php3 .php3 AddType application/x-httpd-php3-source .phps AddType text/html .shtml AddHandler server-parsed .shtml
This allows it to pick up files index.php3, index.phps, index.shtml, and index.shtml. I routinely used index.html and index.shtml and it works fine.