I made tool aimed at end users.
Click here for download.
It uses full fledged PTool engine and easy to run on Mac and Linux also (using Wine or WineBottler).
Version history
v2.55, 14 June 2013
* Added battery patch for D3200 v1.01.
* Added support for Nikon J1 v1.30 (only text patch).
* Added support for Nikon J2 v1.10 (only text patch).
* Added support for Nikon J3 v1.10 (only text patch).
* Added support for Nikon V1 v1.30 (only text patch).
* Added support for Nikon V2 v1.10 (only text patch).
* Added support for Nikon S1 v1.10 (only text patch).
v2.50a, 27 May 2013
* Added support and patches for D7000 v1.04.
* Added support and patches for D3200 v1.01.
* Added patches for D3100 v1.01.
* Added patches for D5100 v1.01.
* Added support for D600 v1.01 (only text patch).
* Added support for D800 v1.02 (only text patch).
* Added support for D800E v1.02 (only text patch).
* Added support for Nikon J1 v1.20 (only text patch).
* Added support for Nikon V1 v1.21 (only text patch).
v2.00a
* Added support for D7000 v1.03 (video limit and text patch).
* Added support for D3100 v1.01 (video limit and text patch).
* Added support for D5100 v1.01 (video limit and text patch).
* Added support for J1 v1.11 (only text patch).
* Added support for V1 v1.11 (only text patch).
P.S. Many patches originally made by S. Pilgrim.