Well I believe that is beyond my expertise so I will take the easier way out and temporarily snag an optical drive from another PC to install windows. I have only a PATA HDD but I can temporarily use either a SATA or PATA optical drive. I want to install xp with ACHI enabled in the BIOS since I will eventually have a SATA HDD and i found out the hard way that to enable ACHI requires a complete new xp install. choices: 1. Sata optical, nlite SATA drivers. (i think i tried this before and it failed) 2 PATA optical on same IDE as HDD (only one IDE header),HDD master, optical slave, nlite install what to do, what to do...