[Zope] pass zope form variables to a htaccess file

I need to pass variables from the extfile form. I created a username field and I need to pass that field value to a .htaccess file in the /var/www/html/ path Is that possible? Also, maybe someone can point me to the right direction on this one. When I create an ExtFile and the directory paths are created how can I automatically create a .htaccess in that directory? Any help would be much appreciated. Thanks. Laura