Apache - Need to modify .htaccess for php in html files or look for index.php

I've installed apache and php on my laptop for testing web pages since I started using php includes for menu's etc. to make sure the pages work. On one site I just modified the .htaccess file so it looked like this:

# -FrontPage-

IndexIgnore .htaccess */.??* *~ *# */HEADER* */README* */_vti*

<Limit GET POST>
order deny,allow
deny from all
allow from all
</Limit>
<Limit PUT DELETE>
order deny,allow
deny from all
</Limit>
RemoveHandler .html .htm
AddType application/x-httpd-php .php .htm .html
Addhandler application/x-httpd-php .html .php

This let me run php includes on .html pages, but I am building another site and I can't get the php code to work in the index.html page. It works fine if I give the pages a .php extension so I thought I'd just put in a line in that had DirectoryIndex index.php in it and rename the page index.php but that didnt work either. Here is my .htaccess file:

# -FrontPage-

IndexIgnore .htaccess */.??* *~ *# */HEADER* */README* */_vti*

<Limit GET POST>
order deny,allow
deny from all
allow from all
</Limit>
<Limit PUT DELETE>
order deny,allow
deny from all
</Limit>
DirectoryIndex index.php
RemoveHandler .html .htm
AddType application/x-httpd-php .php .htm .html
Addhandler application/x-httpd-php .html .php


Am I missing something here?

try just having this only:

AddType application/x-httpd-php .html

or try this:
Options +FollowSymLinks
RewriteEngine on
AddType application/x-httpd-php .html

That works for me on unix and windows / apache boxes