> Besides SP-2, I have downloaded a lot of Windows XP updates -- some
> from Automatic Updates, others as needed to fix a specific problem.
>
> 1. If I ever have to reinstall Windows from the CD, how will I
> include all these updates? Should I back up existing updates, if
> so how?
You can save those you downloaded as stand-alone installers, yes. You may
even be able to integrate/splipstream them into your installation media.
> 2. What is a good strategy for saving & backing up new updates so
> that they will be available in case I have to reinstall XP?
Download them each month - the standalone updates - and store them in a safe
place (not the same drive as you have Windows installed on, perhaps write
them to a CD-RW..)
There are tools out there that can be used to get what you will need...
Example: http://wud.jcarle.com/
Each month Microsoft releases that month's updates in ISO format - but they
*do not* go back as far as you might need.
January 2006-current http://support.microsoft.com/kb/913086
That would be one CD per month since January 2006.
At the end of this line you see "ms##-***.mspx" .. If you simply replace ##
with the two-digit year and the *** with the three character month
abbreviation, you will see the list of "critical" and "important" patches
for that month (since it only happens once a month usually, if you check by
the second Tuesday (wait until afternoon) of each month - you should be
fine) - note that future months will not work.