I appreciate your help. However, I am still getting the winloader.exe error after copying the file directly from the original directory. The file I used was: F1_WinPE.wim. The steps I followed are below: (I did not use the ximage /expport command). Should I have used a different WIM file? Thanks. Step 1: Setup a Windows PE Build EnvironmentOpen a command prompt window. Create a local Windows PE build directory, for example: mkdir winpe\boot mkdir winpe\sources The \winpe directory will be used for creating an .iso image. Step 2: Create an .iso imageCopy boot files from Microsoft Vista OPK CD or Windows PE CD to local build location. Create an .iso using oscdimg tool. For example: copy \\<CD path location>\bootmgr C:\winpe xcopy /cherky \\<CD path location>\boot C:\winpe\boot ximage /export /compress max C:\winpebuild\boot.wim 1 c:\winpe\sources\boot.wim oscdimg -n -b\\<CD path location>\etfsboot.com c:\winpe c:\winpe.iso