Well if you are going to get your PMP then you are already a PM or have 3+ years of documented experience in leading project tasks.
From PMI handbook.
Minimum three years/36 months unique
non-overlapping professional project
management experience during which at
least 4,500 hours were spent leading and
directing project tasks*
35 contact hours of formal
education
Here are the requirements from a basic google search.
A bachelor's degree and 4,500 hours of PM experience in the five process groups, OR, a secondary school diploma and 7,500 hours of PM experience in the five process groups.
35 contact hours of classroom instruction that relate to project management objectives. Several types of courses fulfill this requirement.
Supporting Documentation is required for the above qualifications.
Pass the PMP exam, which consists of 200 multiple-choice questions to be completed in 4 hours.