Slipstreaming SP3 is fine. I used the feature to set the Time Zone to GMT -05:00. After the install the Time Zone was 1/2 way around the world... +04:00 if I recall correctly. Also...about 1/2 way thru the XP install an error window appears: UNREGMP2.EXE failed because WMDRMSDK.DLL not found. The screen was titled: Unable to locate component. Moments before the XP install finished I clicked Ok several times and the error window re-appeared. I continued to click until the window stayed gone. Later, I discovered there was no WMP, 11 or otherwise. I had to install WMP11 from the install package that I had hoped would be included in the slipstream. Nerd