A free, portable Windows and Mac program for editing Nikon IPTC preset files (.NMS).
Unfortunately, Nikon's own IPTC Preset Manager requires Microsoft Silverlight, which may be a deal breaker for many users, due to IT policy restrictions, etc.
This stand-alone Windows and Mac program consists of a single executable file, and does not require any admin rights or other special privileges. It will not alter your system in any way. Files created with this program are identical to those created by Nikon's own IPTC Preset Manager (ver 1.0). http://www.nikonweb.com/iptceditor/
There are probably not many D4 users around here (not yet, anyway), but feedback is always welcome