@Wrong Way Kid - I suspect you have accessed the following site?
www.nikonusa.com
I found a very old site on custom picture controls and it did not mention the D3s as compatible. Have you followed the instructions to the best of your ability?
The old site is this one https://nikonpc.com/
Good luck on getting it to work
Note @Needa nailed it on picture controls, it may be the software used to generate one for the D3 the manual does indicate its possible after a certain software version
How to Create and Save Your Own Flexible Picture Controls - Tips & Techniques | Nikon USA
Gilmar Smith explains how to create your own custom looks for photos and videos using the Flexible Picture Controls feature in Nikon mirrorless camera and NX Studio software.
I found a very old site on custom picture controls and it did not mention the D3s as compatible. Have you followed the instructions to the best of your ability?
The old site is this one https://nikonpc.com/
Good luck on getting it to work
Note @Needa nailed it on picture controls, it may be the software used to generate one for the D3 the manual does indicate its possible after a certain software version