Basic .htaccess Question

I've played with .htaccess before but not to this level. We have a site still in development, when complete. I need to restrict the site so it can only be accessed by 4 IP's at least for now. That part I have found on my own. Order deny,allow Deny from all Allow From 127.0.0.1 (Do I need this for the site to function?) Allow from XXX.XXX.XXX Allow from XXX.XXX.XXX Allow from XXX.XXX.XXX Allow from XXX.XXX.XXX Options -Index (Stop search engine indexing and directory listing, I believe?) My main question is can I just dump this in Public_HTML and configure the website to use this globally or do I still have to place a copy in every folder? I'm running on a GoDaddy VPS server though I don't think that matters. Thanks, Kenny