I understand I can Only have FOUR Primary Partitions on ONE disk.

I'm trying to install 4 operating systems on one machine.
I have 3 OS right now w98,NT workstation,w98.

the problem is that my "unallocated space" is set to Primary!
Since I can only have 4 Primary partitions, I can't install my newist OS NT 4 SERVER.
Anyone got advice.

Partition magic 6

everytime I try to make a Primary partition, it will only let me make a Logical Drive!

So if I can't install NT 4 server on a primary Part, can I install it on a logical drive?