-Activate USB connection with the Flash0 of your PSP and connect PSP to PC.
-Copy the files pspbtjnf.bin, pspbtlnf.bin and pspbtknf.bin (if you have a Slim files are with the "_02g" suffix!) from flash0:/kd/ into patch2flash folder (the same that contains this TXT which you're reading :P).
(in every case, pspbtjnf.bin, pspbtlnf.bin and  pspbtknf.bin must be in the same folder of Patch.bat file!!!)
-Execute Patch_Fat.bat file (double click on it) if you have a PSP Phat or Patch_Slim.bat if you have a PSP Slim & Lite.
-Wait some moments.
-When backup files (pspbtjnf.bin.bak, ecc...) appear, copy /patch2flash/pspbtjnf.bin, /patch2flash/pspbtlnf.bin and /patch2flash/pspbtknf.bin patched files (if you have a Slim files are with the "_02g" suffix!) to your Flash0, overwriting the existings.
-Copy vshmenu.prx in flash0:/kd/ folder.
-Disconnect your PSP from PC and reboot it.
-All done!

Thanks
-To FreePlay for his "NewBTCNFedit" program (http://forums.qj.net/f-psp-development-forum-11/t-release-newbtcnfedit-136210.html)