Urgent Help, Is this possible?

[jag]

Hi Friends,

I need a help form you all

Is it search engine friendly to use .htaccess file as

RemoveHandler .html .htm
AddHandler application/x-httpd-php .html .htm
AddType application/x-httpd-php .html .htm

Purpose: adding php include of a header and footer... for htm file

Thanks in advance

Jag