Many of the kits designed for Windows 3.x and Windows 95 will work just fine under Windows NT on Intel machines.
For complete information see http://ugali.com/wfp/index.html. A brief description is given in wfp32410.txt
The source if needed if you want to
build your own pgp-dll or you want to use the dll within your own programs.
It contains full PGP sources.
The binary if needed if you only want to use the pgp-dll and not build it yourself. It contains the binary of 2.6.3i,
The update contains only the pgp-dll and you must already have PGP 2.6.3i already installed
Full details are available at http://www.gwdg.de/~jpilgri/jvppgp.