My thanks to, among others, Suicide Solution, 911medic, Yen and urie. From their posts, and others, I was able to convert a Dell WinXP SP3 Pro OEM to an IBM version that auto activates without asking for additional help. But since I'm too anal, I decided to remove the three remaining Dell .cab files in the i386 folder. (!DELL_XP.CAB, !DPCHFEN.CAB and !PCVENXP.CAB) They can be deleted and XP seems to install fine but setup asks for the files and has to be told to skip them. Easiest would be edit the install setup commands but I had no idea where they could be found. So instead got an untouched MSDN VLK to convert to OEM using the known to be working: OEMBIOS info, modded winnt.sif, OEM setupp.ini. First try installed but asked for a key so I quit there. Added the PIDGEN.DLL file from the Dell/IBM version and now get a WPA error window saying "a problem is preventing Windows from accurately checking the license for this computer. Error code: 0x800004005". And install won't go past the login page. Maybe it's not possible to do from a VLK? Are there other files that need replacing? Tried to find an untouched SP3 System Builder OEM to try but it doesn't seem to be available anywhere. Thanks again for all the help.