I am using Virtual PC 2007 to test an updated ISO of the Windows XP CD. I've been following the instructions at http://unattended.msfn.org/unattended.xp/ Completed so far: Copy CD contents to C:\XPCD Integrate SP3 Created WINNT.SIF Created SVCPACK.INI Added Internet Explorer 8, Windows Media Player 11, Windows Update Agent 3.0, Windows Installer 4.5, and qchain to SVCPACK Updated ISO and tested. Everything works as expected so far. Run Windows Update and downloaded remaining updates separately. Now I've reached the point where I can use the /INTEGRATE switch or SVCPACK.INF Methods. I thought I would use the /INTEGRATE switch as I did with SP3. First I determined which files utilize the switch using a batch file with FOR %%f IN (*.exe) DO "%%f" /? After moving those that didn't I used FOR %%f IN (*.exe) DO "%%f" /Integrate:C:\XPCD However 17 of the files produced an error when I tried this. IE8-WindowsXP-KB2909210-x86-ENU.exe WindowsXP-KB2849470-x86-ENU.exe WindowsXP-KB2859537-x86-ENU.exe WindowsXP-KB2862152-x86-ENU.exe WindowsXP-KB2868626-x86-ENU.exe WindowsXP-KB2876217-x86-ENU.exe WindowsXP-KB2876331-x86-ENU.exe WindowsXP-KB2883150-x86-ENU.exe WindowsXP-KB2892075-x86-ENU.exe WindowsXP-KB2893294-x86-ENU.exe WindowsXP-KB2898715-x86-ENU.exe WindowsXP-KB2914368-x86-ENU.exe WindowsXP-KB2916036-x86-ENU.exe WindowsXP-KB2922229-x86-ENU.exe WindowsXP-KB2930275-x86-ENU.exe WindowsXP-KB2808679-x86-ENU.exe WindowsServer2003-KB968930-x86-ENG.exe An error occurred while attempting to integrate this software update package. Verify that the architecture, language, and service pack level of this software update are valid for the target distribution folder. I have tested these 17 files separately to see if they install and didn't encounter any problems aside from integrate. Updated ISO and tested. After formatting Windows setup encounters a problem and gets stuck in a loop of continually rebooting. lsass.exe - Not Enough Quota Not enough virtual memory or paging file quota is available to complete the specified operation. So even when the files integrate smoothly something else still goes wrong. I started over and went with the SVCPACK.INF Method. Again I encountered a few problems. Windows-KB890830-V5.11.exe Neither "/Q /O /N /Z" nor "/Q:A /R:N" appear to be correct for this file. Some updates that were included in SVCPACK still appear in Windows Update. IE8-WindowsXP-KB2510531-x86-ENU.exe IE8-WindowsXP-KB2909210-x86-ENU.exe IE8-WindowsXP-KB2632503-x86-ENU.exe IE8-WindowsXP-KB2598845-x86-ENU.exe IE8-WindowsXP-KB2936068-x86-ENU.exe IE8-WindowsXP-KB2964358-x86-custom-ENU.exe