This is and interesting issue! I have the same problem as Thinkster, I have a bounch of IBM laptops with preinstalled OS and want to rewrite the unattended setup for my own purposes, and another goal is to make the OEM-sticker licence key usable (for a reinstall etc). I have been able to interupt a scripted install wihch is done by IBM/Lenovos own deployment tool: Image Ultra Builder. In this aborted install I can find all those files mentioned here, now I just need help to know exactly which files to copy and to where. Thise is how my SETUPP.INI looks: [Pid] ExtraData=786F687170637175716954806365EF Pid=76464OEM These files were found in the ...$OEM$\$$\SYSTEm32 directory 2001-08-23 07:26 13 107 200 OEMBIOS.BIN 2001-08-23 07:24 4 524 OEMBIOS.DAT 2001-08-23 07:24 6 788 OEMBIOS.SIG These files were found in the \i386 directory: 2001-08-23 07:24 3 770 OEMBIOS.SI_ 2001-08-23 07:24 4 624 OEMBIOS.DA_ 2001-08-23 07:26 13 113 771 OEMBIOS.BI_ 2001-09-05 00:54 4 066 OEMBIOS.CA_ The link to the OEMBIOS Repository posted by Bezalael was interesting, but useless(?) without the right Pid and ExtraData, huh? Since I can't find an extracted OEMBIOS.CAT can I just extract and use the one found in the i386 directory? I've read this thread as well: http://www.msfn.org/board/index.php?showtopic=63258&hl= but since I'm using Image Ultra Builder (from a repository) for the deployment I use UNATTENDED.TXT in stead of WINNT.SIF. I hope this will work. I have been able to read the OEM-key that is used from factory and will use it for my deployment. I have no access to an OEM CD and all HD's have been reinstalled with a VLK but with Image Ultra I can restore the machines to it's factory status. Now, what's next? If I copy all 3 (or 4) OEM-files to my i386 directory and chance the Pid in my SETUPP.INI, will that be enough? Every deployment test take 3-4 hours to complete so please spare me some time...