As far as adding a drive, first have a fresh Start up disk on a floppy. Then check the jumper on the back of the drive. Your first drive on the ribbon cable is Master, the second drive on a ribbon is slave. Doesn't matter which plug on the ribbon cable you use. Jump the drives this way. Mount the drive, and plug in the ribbon and power cable. Turn on computer with Startup disk in it. From A:\ type fdisk. Follow the directions. I believe, if this is going to be a second drive, you make the entire drive an Extended Dos partition. Then you add Logical drives or drive letters after that, specifying how big you want them (33%, 33%, 34% would add D, E, F). One thing I do not know though, is whether you would have to add three extended dos partitions to a 20 gig drive, to keep the cluster size at 4k, and assign each ext. dos partition a letter, or if one big extended dos partition broke into 3 drives still keeps the 4k cluster on a 20 gig HD. Once over 8 gig in size, it doesn't matter, up to about 60 gig, as the cluster size will be 8k. Better than Fat16 with its 32k clusters. After you fdisk, then you have to format each drive. Format may hide from you, since the Win98 startup disk puts it on a virtual drive. Like on mine, I have c,d,e drives, so to format, I have to go to a virtual f drive, then type format d: . You will figure it out.