I clean install first. Use fdisk and make 2 partitions. The size depends on how you want to use the space and the size of the drive. If a big drive, say over 15GB, I like to make 2 equal. You dont need partition magic at all.
Then format both of them. Install win98 first, all drivers, etc.
Once you have installed Win98, insert the Win2k CD, choose clean install, not upgrade. Follow to where you see advanced setup options. Tell it you want to choose the partition to install, then chose the D drive, if that is your second partition. It will install there and install it's own boot manager. When you boot, you will see you have the option of Win98 or Win2k. It's pretty easy. Don't format NTFS or Win98 will not be able to access the D drive.
