Thread:Project:Support desk/Installation folder

I want to install Mediawiki into a folder about my public_html folder to keep it secure. I have created a folder called mediawiki in my root folder. How do I then point the browser to it to do the installation? What files will need to exist below the public_html folder? Is there a guide to this, or am I trying to do something that is typically not done? I just don't want my files exposed to the public.