Running processwire site in unpublished mode

[grumpy]

I have an existing website.  I have installed processwire in my root directory and it all works fine.  I have set all the existing sample pages to unpublished mode while I build up the replacement website using processwire.  My problem is that I have now two index files: my original index.html and the new processwire index.php.  Is there a way to set the index.php to be hidden unless called for to log in to processwire, thus leaving index.html as the gateway to my existing website?

I know I can put processwire on a subdomain but I need it to link into my genealogy database php pages on my old site.  The blurb on my genealogy scripts says:

Can be used with Wordpress and other content management systems.
Not only does TNG work great on its own, it can also function seamlessly as a module under any of these systems (with single sign-on) when used with an approved freeware add-on program. Use whatever theme you want!

Any advice would be much appreciated.

[LostKobrakai]

Just use this in the beginning of your templates.

if(!$user->isLoggedin()) $session->redirect("/index.html");

[grumpy]

Thank you.  Done and solved.