if you need the post sp2 updates integrated into your xp disc (which will make it faster and save you from heading to windows updates). head and get ryanvm update pack.
RyanVM's Windows XP Post-SP2 Update Pack
the actual pack
|MG| RyanVM's Windows XP Post-SP2 Update Pack 2.1.11
you will need the integrator to slipstream it
Official RVM Integrator website - Download
put
both files on the desktop. Fire up
RyanVM Integrator. Set the source to
the Original Retail directory that you
created with nLite. For the destination
directory, we created a new directory
on the desktop named XP_all_updates.
Under Choose an Update Pack CAB,
select the Post-SP2 update that is on
the desktop. Click integrate; it will take
about 10 minutes to add the files to
your build.
When the integration is done,
restart nLite to make a bootable iso.