Previously when installing XP, it would report "No hard disks detected. Press any key to cancel installation", unless I installed the Raid driver from a floppy, by pressing F6 when prompted during the install. I don't understand the driver disk, just follow the windows prompts and it all works out. The floppy has several options, but four files in particular that I think are relevant, in the A:\RAID\180\winxp folder: Property.dll Sisraid.cat Sisraid.inf Sisraid.sys When prompted by NLite, I selected Sisraid.inf, and assumed that the program would deall with the dll cat and sys files appropriately. But when I ran my slipstreamed CD, it didn't detect the hard drives. is there anything obvious I'm doing wrong? There is a similar set of 4 files in the A:\RAID\180OB\winxp but I didn't select them My Mobo is an Asus P4800D-x Thanks Tony