Clean install with SP2

I just installed SP2 and so far so good .  I was wondering if I wanted to do a clean install of Windows in the future if I have to:

1) Install windows from my CD. 

2)Install XP SP1 (which I have already downloaded). 

3)Install SP2 Which I have downloaded).

Or can I just go Windows from the CD then SP2.  Basically does SP2 include everything in SP1?  Thanks for any info.