The basic install of WinNT usually will not allow you to go any bigger than 2-3GB on the first install. After you install the OS, you will then be able to service pack to at least SP3 (I recommend SP5). When you use Disk administrator at that point, NT will be able to "see" the rest of the drive and format it.
At this point, you can use Partition Magic to change any drive partition on the disk, even the boot partition.
Good Luck.
Check out my rig:
<A HREF="http://www.anandtech.com/mysystemrig.html?id=3737" target="_new">http://www.anandtech.com/mysystemrig.html?id=3737</A>