Loading Small Business Server to 30GB dr

Attempting to load SBS4.0 to a 30gb IDE drive. After identifying partition to format as NTFS, system will load from CD-ROM and reboot. It will identify the partition as FAT, then do conversion to NTFS and then reboot. Then the system says there is no boot files. What is happening to the NTOSKRNL.EXE? What am I doing wrong? Not much hair left! Have formatted and partition drive in another NT workstation, formatted and loaded system as FAT, which worked. Have identified the CD-ROM as a different loader for large drives. This is getting frustrating!!!