Looks like I solved it. Using geitonaki's SFX file as explained by andregcasal to create the PRO1 boot folder works great. In fact this method copies the driver files you've integrated to the PRO1 folder automatically. What it didn't create was the PRO1.DAT file which I got from the old Guide by flyakite. Thanks andregcasal, and can you answer a question. You said: - [GuiUnattended]DetachedProgram="%SystemRoot%\System32\cmd.exe /c @ECHO something>%SystemDrive%\XPPRO.TAG" Is the TAG only needed if you are going to use the RunOnce.cmd? Or what does this TAG do?