I have now made available a new version of the installation guide of NAV on CentOS (a Red Hat Enterprise Linux clone).
It is based on the latest versions of NAV and CentOS available.
You will find it on this link on MetaNAV:
http://metanav.uninett.no/installingoncentos5
Please give me feedback if you find any errors or omissions. Or if you just want to thank me for making this guide.
Best regards,
Roger Aas Atea AS