It aint that bad, only if you have the boot/fuel release from a Super S or SR micra.
Which consists of the cable, boot release mech, fuel release mech, and latch control mech for the handle by the drivers side door.
It involves removing the back seats, rear passenger door card (3door) and beneficial to remove the drivers seat too. then the idea is to start from the boot end first, feeding the cable from the boot through the rear passenger side quarter panel, below the rear seats then over to the drivers side floor... I was thinking of making a guide but since im stuck with uni work it will be by the first week in june for me to get a guide sorted.
Hope that helps