Using Sysprep

Ok, this has me frustrated. I have a master installation of XP Pro all configured with my common departmental applications, all service packs, printers…its done. I want to sysprep it and have it run the mini-setup upon imaging (I’m using Drive Image Pro 5). I want to be prompted to name the PC, join the domain and have to type in the correct XP OEM number from the case sticker so as to remain in proper license compliance. The thing thats getting me is I can’t seem to get the OEM number topop up and I can’t figure out how I’ve done it before. I’ve tried the audit, factory and reseal switches but nothing I do seems to make a difference…I created a new sysprep.inf file, but that didn’t help either. What am I doing wrong?