I made some huge posts at Next L3vel Forums about Windows XP Service Pack 2. Take a look at my posts using the links below. Also, added some screenshots.
Download: Windows XP Service Pack 2 Document
View: Whats New in Windows XP Service Pack 2?
View: Network Protection in Windows XP Service Pack 2
View: Internet Connection Firewall in Windows XP SP2
View: Memory Protection in Windows XP Service Pack 2
Screenshot: WinVer
Screenshot: Internet Connection Firewall in Service Pack 2
Screenshot: Internet Connection Firewall Exceptions
Screenshot: Internet Connection Firewall
Download: Windows XP Service Pack 2 Document
View: Whats New in Windows XP Service Pack 2?
View: Network Protection in Windows XP Service Pack 2
View: Internet Connection Firewall in Windows XP SP2
View: Memory Protection in Windows XP Service Pack 2
Screenshot: WinVer
Screenshot: Internet Connection Firewall in Service Pack 2
Screenshot: Internet Connection Firewall Exceptions
Screenshot: Internet Connection Firewall