AOL Security vs Norton AV

I recently installed a DSL for a friend who is a will remain an AOL user.
This friend uses AOL Version 7 and Norton Antivirus 2005. During the
installation AOL "pushed" the upgrade to their newer version with "free"
security. Suspecting there would be a clash between AOL Version 9 and NAV
2005, I decided to complete the DSL installation using AOL 7 and NAV 2005.
The current NAV 2005 update subscription last until January 2007. This
raises a couple of questions which I hope can get answered here:

1. Is AOL Version 9 a valid way to satisfy the Windows XP SP2 requirement
for an anti-virus program?

2. Assuming that answer is yes and the "free" price for AOL pushes us in
that direction should I:

a. Uninstall NAV 2005, then upgrade AOL now?

b. Wait until the NAV subscription expires then take the steps listed
in a above?

c. Stick with AOL 7.0 and upgrade NAV when the current subscription
expires?

d. Any other option?

Thanks

Jim Snively