Moved to SecurityCenter.
Sorry no it isn't but you could call Technical Support to see if they have any workarounds. It's free and linked under Useful Links at the top of this page although I doubt it. The installer fetches all the necessary files and updates everything in the process of installing.
By the way the home products aren't compatible with Windows 2003 Server and only with XP if Service Pack 3 is installed.
You are talking about the consumer/home products here? Not sure because you originsally posted in a forum help area. I believe but am not sure that the Enterprise products behave differently and the above may be possible.