Setting DevicePath in registry during T-39

[Afterdawn]

I want to have my DevicePath-key automatically set at the T-39 minute stage, by means of a DetachedProgram. I know that a program called SetDevicePath.exe exists, but I want to create it in a script, so that I can add/modify my own things...

I currently run this script as a detachedProgram, and it does change the DevicePath entry correctly in the registy (complete with %systemdrive% and all), however it seems like when this script is run, Windows Setup has already read the values from the Registry, because my custom drivers aren't installed..

I use this script:

@echo off

set drivers_path=%SystemDrive%\drivers
set drivers_prefix=%%SystemDrive%%\drivers

set newPath=%%SystemRoot%%\inf
call :traverse %drivers_path%
reg add HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion /v DevicePath /t REG_EXPAND_SZ /d %newPath% /f
goto :eof

:traverse
  pushd %~f1
  if EXIST *.inf (
    set curPath=%drivers_prefix%%~2
    call set newPath=%%newPath%%;%%curPath%%
  )
  for /d %%I in (*) do (
    call :traverse "%%I" "%2\%%I"
  )
  popd
goto :eof

Who can help me out?

Note:

I already have a solution where you can automatically add entries to the winnt.sif file. Look here if interested. So that is, before the installation, at ISO-creation time. But now I want to create a script that does this at Install-time.

Edited February 6, 2005 by Afterdawn

[Afterdawn]

-Updated my startpost-

[Bâshrat the Sneaky]

-Updated my startpost-

Run if BEFORE setup > you'll need a fake setup.exe that allows you to execute a batch file = Pyron's method > you can use Pyron's SetDevicePath.exe > makes your batch file obsolete

[Afterdawn]

I've come so for already, I won't resort to using Pyron's files after all...

Yes I'm thinking about running it prior to setup too... well I'll try that.