mate it to a primera gearbox and fiti it in the front..... or fit it in the rear with the driveshafts powering the rear wheels.....
to RWD a micra you would have to cut out the firewall. cut out the floor and cut out the boot floor, then make a subframe for the rear of the car, a transmision tunnel and custom drive/prop shafts, custom engine mounts, ecu, cables, firewall, suspension, floors, plus chassis streangthening...
it do-able.......just, i would say find decent shell, take the floor out and sell ALL the bits, (maybe even make a profit) then cut the floor out and meassure up for the engine..... the tranny tunnel you could take out of the sylvia and weld into the floor of the micra.
i would say maybe £3.5K in total if done on a shoe-string with a mechanic friend.... or £5k+ for ultimate RWD micra action....