Here is the problem I'm having. After updating my txtsetup.sif to include Intel SATA driver and running makecab c:\winxp\i386\oem\$1\IntelSATA\iastor.sys c:\winxp\i368\iastor.sy_. I've confirm that iastor.sy_ does exisit but during the text setup it state that it cannot find iastor.sys. I'd then boot into DOS and notice that iastor.sy_ was not copy over to c:\$WIN_NT$.~BT\. If I manually copy iastor.sy_ to this directory then my unattend runs without any issue. Don't know why it's not copying over. Please help. THX, QC