Boot Camp (XP SP2)

Yep, thats the right one

 

Keep an eye out for SP3, it will be out very soon.

 

xp with integrated sp2 is the only xp version that will work with bootcamp...
if you only have a normal xp without sp2 you may want to check out nlite (a little utility that lets you integrate sp2, hofixes, and much more)

 

also make sure it's the whole copy of windows and not an update copy. according to Apple, it won't work with the upgrade version of XP.