There were two MSKB articles related with AutoCAD issues after SP2 installation.
1. Google's Q884130 -"Programs that may behave differently in Windows XP Service Pack 2"
Actual Q884130 -"Programs that are known to experience a loss of functionality when they run on a Windows XP Service Pack 2-based computer" article.
It seems that Autocad 2004 vanished from the problem list.
2. Q842242 -"Some programs seem to stop working after you install Windows XP Service Pack 2"
As far as I can tell you, AutoCAD 2004 was working after SP2 install. At the moment I don't see any windows XP Sp2 related info at Autodesk's site.
Trying to unweave, unwind, unravel
And piece together the past and the future,
T. S. Eliot
Will I be able to use AutoCad 2000,2004 after installing sp2?