NT 4.0 only supports FAT16 and NTFS in it's native form. Your boot partition should be a FAT16 partition in case of a crash it is easy to recover, however FAT16 has a 2gb size limit so use NTFS for all your other partitions. Use FDISK and delete any additional FAT partitions, go into NT and use Disk Manager to create a new partition, select NTFS as the partition type and create a partition of up to 3 TB. Have fun. BTW there is a module that will allow NT4.0 read FAT32 partitions, I have no experience with this and as such cannot reccommend it, I would use NTFS, it is native to NT 4.0, has K-2 security when accessed from NT workstation and is reliable.

Let me know if this works for you.