You should be able to use the Nissan condensor and evaporator with out issue. You will just have to fabricate the rest of the system as far as lines, reciever/drier and if you are going to use an orfice tube or H-block system. Then you will have to figure out how to hook it up to the Nissan control head inside the car and then wire it to the PCM so that it "knows" when to turn the comressor on and off. You should also have it wired so that the radiator fan will kick on to a high speed when the A/C is on, IMHO.
Oh and welcome aboard!
Guy