If you are stuck fixing your relatives' PCs, make sure you download the IT version of SP2 from Microsoft Technet. You can burn it to a CD and easily install SP2 onto multiple XP systems. It is a huge download, but can be a real time saver when working on multiple systems.
Heh... I have my handy 'geek disc' with it loaded on it for the one and only XP box I fixed... the other 6 had either WinME (The Mistake Edition) or Win98.