Hello, Welcome to Just Answer and thanks for your question. Have you checked with the local community colleges or hospitals to see if they have a refresher course for nurses? I know that Vanderbilt has an excellent refresher course, but sometimes smaller colleges do as well. Below is a list of all refresher courses approved by the Tennessee Board of Nursing. Be sure to note that some are for LPNs versus RNs. http://www.uthsc.edu/nursing/continuing%20education/documents/Approved%20refresher%20courses.pdf
Nursing is nothing at all today like it was 20 years ago. I would with all respect doubt that you would be able to obtain a job as an RN without a refresher. Just attending a refresher course is also a great way to get into the hospital system associated with the course. Seeing you in action is far more powerful than an out-of-date resume.