The IE7 and the WMP11 are not included in the XP SP3.

if you have integrated the xp sp3 beta to the XP SP2 Installation CD, it will replace the IE and WMP to IE6 and WMP9, and there will be a problem: you cannot install the IE7 in the installed XP. So we just can integrate the IE7 after the SP3 had integrated. The WMP11Slipstreamer also cannot work with the xpsp3.

1. integrate the drivers of your computer device which can not be recognized by XP. 
2. integrate the sp3 to the installation cd of XP.
3. integrate the IE7 to the sp3 integrated CD by nlite.
4. put the switchless installer of WMP11 and .Net Framework 1.1 2.0 and 3.0 in the CD. it will be automatically execute after the xp installed.
5. burn the cd or boot with the WinPE to install the OS.