I hope someone can help me because this problem has been driving me crazy.

I need to convert my pages to accept .shtml. At the moment they are all in html.

The reason I want to change the extension is to make use of the Entropy Banner script within Cpanel.
<!--#exec cmd="cgi-bin/entropybanner.cgi"-->

I read somewhere that I could make the server believe they were shtml extensions by using the apache handler and server-parsing .html
I tried this but is didn't work. Then I uploaded the following to my .htaccess file.
Options +Includes
XBitHack on
AddType text/html .htm
AddHandler server-parsed .htm

AddType application/x-httpd-php .php .php3 .phtml .html .shtml

This still doesn't work and I don't really know what i'm doing. With this code in .htaccess I don't get an error message but I don't get any rotating banners either.

I also recieve an error message sometimes:
'an error occurred while processing this directive'

Please help and I hope you understand what I mean.