I was able to follow the instructions and install nagios and fix my first problem with the logging in by changing the directotyIndex in the httpd.conf file. Now I have a problem where all items in the sidebar appear as links and when I click on them they error out. I checked the error_log file and it says:
File does not exist: /usr/local/nagios/share/<, referer: localhost/nagios/side.php
I am a real newb when it comes to Fedora and Apache so any and all help would be much appreciated.