Using the .htaccess file to extend the php.ini include path entry

I want to add some directories to the "include path" entry in the php.ini file. I have to do this via the .htaccess file because I do not have access to the php.ini file on the server. Will the additional directories in the .htaccess file replace the directories in the php.ini file or will the ones in the .htaccess file be added to the directories in the php.ini file? -- Jan saint.urho@xmtc.net