SP2 and the Firewall

Can’t believe it. My first failure in over 100 installs of SP2.

Something in the install failed. Posssibly because McAfee firewall was running in the backgound. Thought I checked that. Now the XP firewall in not able to start the service. I am unable to manually startit.

Is the firewall/ICS able to be installed withhout the whole SP2? Must I uninstall and reinstall?