I have Nismo AFM's, in the box you would have got a peice of paper that shows the voltage curve diferences between the gtr, z32, and nismo AFM's.
You or your tuner will need to select the VQ30 option, and then edit the % on some voltage levels, i have a spreadsheet that shows the % settings to put in the PFC.
this is my peice of paper i got, i put the grid in, and the red lines are PFC voltage markers.
this it the spreadsheet that has the pfc % settings.