I doubt a 'failed network boot' is related to a fake setup in any way. Yes, but would that matter? In short, this is what it does: Note: Windows 2K/XP/2K3 setup executes a setup.exe, it won't check for the integrity of it, which is why we can replace it that easily. Setup executes I386\SETUP.EX_ (or SETUP.EXE, doesn't matter), which is now a fake one. This fake setup will execute I386\presetup.cmd (Which extracts the DriverPacks to the harddisk, then alters the Device Path key in the registry and disables the Driver Signing Policy. After that, it will rename the real setup back to "setup.exe".) and then starts the real setup. That's it. You can find that in the I386\presetup.cmd file. Which DriverPack LAN version are you using? Or - if you added the driver yourself - which version of the Intel LAN driver are you using?