Sharing Custom Picture Controls starts on page 172 in the manual. Here are the steps:
1) Go into the shooting menu 2) Select Manage Picture Control 3) Scroll down to Load/save 4) Select Copy to card 5) Select a Picture Control 6) Choose a destination 7) Press OK
The destinations are 1 through 99.
The manual doesn't explain how the picture controls are saved on the card. I'm experimenting with my D300 at the moment, but I'm certain it works the same way for the D700. When put my card into a reader, I found the picture control files I created in:
where xx is the destination number you chose like 01, 02, etc. If you want to share or save that file, rename it so you can remember what it is. In this case, I would probably rename it C1-AAASTANDAR-02.NCP. The manual describes how to load picture controls from the card to the camera, but it doesn't really explain where on the card to put them so the camera can find them. I suspect that worst case, we can just rename them back to the way the camera writes them.