http://www.macdevcenter.com/pub/a/mac/2003/05/16/web_files.html?page=last&x-maxdepth=0 Option 2 is what you want.
Now to get into that hidden folder you can just go into macintosh HD then click the go menu at the top then "go to folder" and type in /etc/httpd/ Also make sure you make a copy of the file..and you will need to change the permissions on it as i recall to change it. Just change it back to what it was when your done.

We can help more if you can't figure out it out.