Hey stcroix:
http://hawaii.gov/dcca/areas/pvl/boa..._publications/
click on "nursing--endorsement only" and print the packet and instructions in the PDF file. If you have to call the phone numbers, remember the time difference from wherever you are.
It takes about 6-8 weeks. If you plan to work in Hawai`i, facilities and agencies will require that you present a recently documented two-step PPD, documentation of all your immunizations and/or titers (chickenpox and rubella/rubeola,) and a physical within the last year from your doctor. And have an updated resume with references.
Any state you want to practice in has a website for their board of nursing, just google it.