Trying to get 2 hard drives working

I have two hard drives- One is a 6.XX gig and the other is a 13.6 gig.

Here is my problem- I want to install NT 4.0 on the 6.xx drive and win2k on the other. I have them both set as primary 1 and primary 2 with my cd-rom as a slave.

When I attempt to install win2k- no problem- it defaults to the 13.6-(label c) Now, when I attempt to install nt 4.0 to the 6 gig, number one- it wont allow me to install over 4gigs- but more importantly- It will not register as a seperate disk- It keeps reading my c: even though I want to install to the d: _(second drive label.)drive.

I have tried fdisk, formatted my drives with both fat32 and ntfs- I just can’t get NT 4.0 to stop noticing my c drive.

Any help?