Create the following folder structure once you have finalized your Windows setup by integrating driver, updates and whatever else you want to integrate into the WIM file :- <disc_root>\sources\$OEM$\$$\SETUP\SCRIPTS\SETUPCOMPLETE.CMD <disc_root>\Apps Here, disc_root is your working directory/folder. Now whatever applications you want to install without copying them over to the HDD, you put them in the Apps folder. Write code to call these application installers in the SETUPCOMPLETE.CMD file. My sample SETUPCOMPLETE.CMD is below. If I want to abort the installation, I simply have to remove/detach the installation media from the PC be it an external HDD, DVD or a USB drive. The application setups are executed from the disc directly. cmdow @ /HID@echo offFOR %%i IN (D E F G H I J K L M N O P Q R S T U V W X Y Z) DO IF EXIST %%i:\CD.txt SET CDROM=%%i:REG ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnceExSET KEY=HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnceExREG ADD %KEY% /V TITLE /D "Removing Setup Disc Will Cancel Installation." /fREG ADD %KEY%\001 /VE /D "7-Zip 9.20" /fREG ADD %KEY%\001 /V 1 /D "%CDROM%\Apps\7z920.exe" /fREG ADD %KEY%\002 /VE /D "Java Runtime Environent 7 Update 17" /fREG ADD %KEY%\002 /V 1 /D "%CDROM%\Apps\JRE7u17.exe -ai -gm2" /fREG ADD %KEY%\003 /VE /D "K-Lite Codec Mega 9.75" /fREG ADD %KEY%\003 /V 1 /D "%CDROM%\Apps\K-Lite_Codec_Pack_975_Mega.exe" /fREG ADD %KEY%\004 /VE /D "Google Chrome" /fREG ADD %KEY%\004 /V 1 /D "%CDROM%\Apps\ChromeStandaloneSetup.exe /silent /install" /fREG ADD %KEY%\005 /VE /D "Microsoft Redistributable Packages" /fREG ADD %KEY%\005 /V 1 /D "%CDROM%\Apps\VBCFJRedist_AIO_x86_x64.exe /y" /fREG ADD %KEY%\006 /VE /D "dotNet Framework 4" /fREG ADD %KEY%\006 /V 1 /D "%CDROM%\Apps\dotNetFx40_Full_x86_x64_silent.exe" /fREG ADD %KEY%\007 /VE /D "ImgBurn 2.5.7.0" /fREG ADD %KEY%\007 /V 1 /D "%CDROM%\Apps\iBurn257.exe" /fREG ADD %KEY%\008 /VE /D "DirectX" /fREG ADD %KEY%\008 /V 1 /D "%CDROM%\Apps\dxrtfull.exe" /fREG ADD %KEY%\009 /VE /D "Adobe Reader 11" /fREG ADD %KEY%\009 /V 1 /D "%CDROM%\Apps\adober11002.exe -ai" /fREG ADD %KEY%\010 /VE /D "Adobe Flash Player" /fREG ADD %KEY%\010 /V 1 /D "%CDROM%\Apps\AdobeFlash.exe" /fREG ADD %KEY%\011 /VE /D "Search Everything" /fREG ADD %KEY%\011 /V 1 /D "%CDROM%\Apps\Everything.exe /S" /fREG ADD %KEY%\012 /VE /D "WinCDEmu 3.6" /fREG ADD %KEY%\012 /V 1 /D "%CDROM%\Apps\WinCDEmu-3.6-silent" /fREG ADD %KEY%\013 /VE /D "Office 2010 ProPlus" /fREG ADD %KEY%\013 /V 1 /D "%CDROM%\Apps\Office_2010x86\setup.exe /adminfile Basic_Modal.MSP" /f::REG ADD %KEY%\014 /V 2 /D "%CDROM%\Apps\Office_2010x86\SetupOfficeTabEnterprise.exe /VERYSILENT /SUPPRESSMSGBOXES /NORESTART /SP-" /f::REG ADD %KEY%\014 /V 3 /D "%CDROM%\Apps\Office_2010x86\MicrosoftToolkit.exe /EZ-ActivatorOffice" /f%~dp0"Program Install.exe" /s::CLEAN-UPcd %~dp0attrib -R -A -S -H *.*SHUTDOWN /R /T 5cd..RMDIR /S /Q "%WINDIR%\Setup\Scripts"EXITSee attachment for installation screen during first logon. EDIT 1 - The CD.txt file mentioned in the 3rd line of the code is a dummy file. I have actually written the changes made to the setup in it. If you don't want to use it then you can change it to point to an installer in your apps folder. FOR %%i IN (D E F G H I J K L M N O P Q R S T U V W X Y Z) DO IF EXIST %%i:\Apps\7z920.exe SET CDROM=%%i:7z920.exe is one of the installers I am calling in the SETUPCOMPLETE.CMD Have commented the Office 2010 entries. They work but was unable to get the activator to run silently. EDIT 2 - %~dp0"Program Install.exe" /s This file is copied to C:\WINDOWS\Setup\Scripts folder and is then executed from the C drive. It executes before the last restart (Windows is finalizing settings window of setup) after which the machine boots up for first logon. On the installation media, this file is located along with the SETUPCOMPLETE.CMD file in the <disc_root>\sources\$OEM$\$$\SETUP\SCRIPTS\ folder. More programs can be executed this way. The user cannot prevent the execution as these are executed from the HDD. The last CLEAN-UP portion deletes these copied files. EDIT 3 - Some important links. 1 - http://unattended.msfn.org/unattended.xp/view/web/18/2 - http://unattended.msfn.org/unattended.xp/view/web/31/3 - http://unattended.msfn.org/unattended.xp/view/web/59/Successfully seen this method working with Windows XP SP2, Windows 7 x86 & x64, and Windows 7 SP1 x86 & x64. EDIT 4 - RunOnceEx entries to execute registry files and command prompt commands. REG ADD %KEY%\001 /V 1 /D "cmd.exe /c del /Q C:\Adobe Reader 6.0.lnk" /fREG ADD %KEY%\002 /V 1 /D "regedit /s %CDROM%\Apps\begin.reg" /fEDIT 5 - The 2nd attached image of Finalizing Installation is when "Program Install.exe" is executed. Then the PC restarts and boots from the HDD. Then before/at FirstLogon, the RunOnceEx entries software is executed from the install media (CD/USB) as shown in first image. PS:- Ignore the title of the window shown in the attachment. Have changed it in the code. The title of the window supports only limited characters. Image is of a test install. If anyone knows how to change the "Windows is now setting up the following items" text shown in the attachment, please let me know. Image 1 Image 2