BleepingComputer.com: Norton + Avast = Could I make them run together?

Could I make Norton and Avast run together? Where I could make Norton be my firewall and have Avast be another virus scanner? My friend says that he has it setup somehow but he gets a message from avast saying that they are conflicting or something. I was just wondering if there was a way to get around this?

Can you? YES
Should you? NO
Is it a good idea, do you get better protection? NO

The danger, is that one antivirus program may (Read this as eventually will) see
the others definition files as viruses, and will remove them. This is not so much a
problem with manual scans, where you only run one Antivirus program at a time, if
you pay close attention to what it detects, and where. If you manually configure it to
ignore the other program, and its files, then you minimize the risk from this problem.

The big problem, is the silent threat. Most antivirus programs will scan web based
(not necessarily all, like P2P, and IM) file transfers. It is quite common, for one
antivirus program, to detect the incomming virus updates for the other. Thinking parts
of the definition files are viruses in their own right, the AV will strip these out of the
update.
The end result? Instead of having two, or even one, up to date fully functional
antivirus programs, you have two severely crippled programs, which are each
missing critical definition, and detection files .

So, it is best to have one antivirus program, and keep it up to date and use it
properly.
Then, if you experience a problem, or question its efficicacy, you run an online scan.

http://www.pandasoftware.com/activescan/
http://housecall.trendmicro.com/