norton antivirus 2008 - internet worm protection

nav 2008 has "internet worm protection", is it a firewall?
to people who use or have used nav 2008, does this "internet worm protection" give you problems with your firewall? 2 firewalls are not recommended, so can i install a firewall with nav2008, like zonealarm free or comodo?

 

i have zonealarm free installed, when i try to install norton antivirus 2008, i get a message from the norton setup that zonealarm must be uninstalled or there "may" be compatibility issues

should i turn off internet worm protection in nav2008?

 

I think you should upgrade to Nav2009 it is lighter , faster , secure and free for you, after that tell us if any incompatibilities appear.