I bought an SATA Seagate Barracuda to replace my WD Caviar drive.

Both are 200Gig

I am running Winxp SP2.

How do I just switch the entire contents of my current drive to the new one without having to do a fresh install?

I know, it's a noob question. I just have never had to do it before. I have always been content to re-install windows. I don't feel like doing it this time