Hello folks... I am in California, a state that DOES allow the FE exam waiver provided you can document 15 years of experience relevant to your discipline and have an accredited engineering BS degree. A pre-requisite for the PE license is to have 6 years of professional experience which you can prove through "engagement records", a minimum of 4 is required. So to request a waiver all you have to do is check a box on the application and document the additional 11 years by adding more engagement records. I applied for one and had no trouble getting it.
If you have been out of school for a while and and are not intending on getting a multi-state PE license, I'd strongly recommend you spend your time on prepping for the PE exam and get a waiver for the FE. They are two different exams and although some of the FE exam principles will help you prepare for the PE, I'd focus my energy on "the real deal."