Changing Operating Systems

Hi all, First wish to thank you for always being here and a special shout out to Todd for the work he does and the person he is and how quick he was to get me a new license# superfast today.
Here's what I need help with: Just updated today to xp sp2 ( is sp3 still scary? ) from 2000(talk about slow ,I know) and also installed FD-ISR 3.32.235 and since this XP is very new and clean I want a snapshot of course. My old snaps are still there even with the new OS install and of course in the new FD-ISR update. My question is, if I "update" from a win2000 snap to my new XP system will the snap in any way "less clean"?
I was never afraid using FD-ISR and it saved my bacon but now I'm unsure.
Can you help?
Thanks,
Lar