What jnuts said.
If you want to clean up the "Add/Remove Programs" list, you can download "TweakUI" from Microsoft -- it gives you lots of ways to make XP more friendly, one of them being it can remove those icons from the list without uninstalling the fixes. You're basically telling Windows "OK, I know I will never want to uninstall these, so there's no point having an uninstall icon for them."