yes. if you do not need. go for home edition.
but if you're in need of the license (commercial use) or feature, no choice have to go to Professional.
somehow, you;ll notice this sentence :
this feature is not available in this version of windows.
this feature only available in windows xp professional.
The CD is totally irrelevant. You can download it off the web or copy from a friend.
The thing that you are buying is the licence in the form of the product key.