I too have a new desktop. The motherboard is an ASUS Sabertooth Z97 Mark 1. It has the dreaded UEFI. I want to install my Windows XP Pro 32 bit onto one of the 3 hard drives. The system came with Windows 7 Ultimate 64 bit installed onto one of the 3 hard drives. I have Fernando's modded driver nlited. Just incase, I also have created an F6 floppy with Fernando's modded drivers. I would use this floppy if the nlited CD would not work Could you please state the conditions which allowed successful XP run and install?
