如何使网站应用程序出现在网站的根目录中？

I have a bulletin board (punBB based) that I was running out of the root directory for a couple of years. I foolishly decided to do a little gardening and in the process moved the punbb code into it's own subdirectory. The code works great; as long as you point the browser at the new subdirectory. The issue is that the users expect to see it at the root...I have a bulletin board (punBB based) that I wa