Thank you for your fast response and your hint that led to the solution!

And a very big thank you for those driver packs. They help reduce the work while installing dozen of machines.

I guess it's time to donate.  :-)

My log says
"...<PREP> No previous DriverPacks installation found, Prep stage will be skipped"

That is because I deleted the OEM folder I guess and so it added its new content to the end of the previous presetup.cmd instead of deleteing it before.

So it was clearly my fault.

I will try using a clean i386 folder...

This version does not clean up the presetup.cmd if there are commands in there from older Driverpacks.

It simply adds itself to the EOF.

(I am not sure if the previous version did empty the presetup.cmd before adding its own commands.)