Right. It seems to me that I can now install W2k at least ) The reason of fail is definitely code that means "copy from CD \I386 to...". For your OS it is "100" and "1" for mine W2k. Thus here is solution. Unfortunately I can't check it right now but I'll do it as soon as I can and revert to you on this board. Also it is not possible to check driver installation using WMWare Workstation, I have to do it on real system. Also there is difference in our winnt.sif - I mentioned in it that place for system folder location is winnt and you are using windows folder. Thank you VERY MUCH!!! Your idea should work for installation of some apps f.i. JRE by the same way - you can make cab file, include it into list of cab files, make direction where to copy it during installation and run it using RunOnceEx, huh? Thank you once again and promiser to report about result, Alexey