Yeah, I did this about 3 months ago, you will need a thread adaptor, it is a BSPT 1/8, nissport sells the adaptor that lets you can keep the oil light plus add a oil pressure line also, here is the link:
http://www.nissport.com/catalog/prod...EquipmentType=
I think you will get a ecu code if you do not hook the stock oil pressure system back up, if you need any more help let me know.