I have recently created a Slipstreamed install disk for WinXP using SP3.
I have the following hardware:
MSI K9A2 Platinum Motherboard
AMD Phenom 9850 Processor
Creative X-Fi Platinum Sound Card
The sound works fine on both the on-board audio device and the X-Fi device under XP SP2. Once SP3 was installed, neither of the sound cards work at all.
I disabled the on-board through the bios.
The X-Fi installs fine with the newest drivers and shows up in all applicable areas of the OS.
Only the hardware beep works.