I followed your guide for an unattended XP install, which was very helpful. However, upon testing my ISO in Microsoft's Virtual Machine Trial I found that the CD Key, which I have made sure is accurate, is not excepted. I am using an XP Pro Upgrade CD. I am unsure as to whether this guide will work for an upgrade CD. If this is the problem what might some possible solutions be? If this is not the problem is there some batch file I have screwed up? If you need more info let me know. Thanks a lot for this guys. If this ends up not working at least I've still learned a good deal