The first part of SWO-EDO training is exactly the same as SWO (going straight to ships after OCS now, getting your pin, etc.) After your initial sea tour, then you decide if you want to stay SWO-EDO or redesignate SWO. From this websight
http://www.cnrc.navy.mil/noru/orojt/generalofficer.htm
Engineering Duty Option Program. Ten Officer Candidate School quotas are available per year for this program. Officers begin their careers as conventional Surface Warfare Officers, and can exercise their option to become EDs after completing their warfare qualification, and a minimum sea tour, typically two years. Shortly after reporting to your ship, you'll be assigned a local ED mentor, available to provide information and answer questions.
All EDs must earn a technical Master's Degree, either at Massachusetts Institute of Technology or Naval Postgraduate School (NPS). ED-approved curricula include Naval Construction and Nuclear Engineering at MIT, and Computer Science, Combat Systems & Technology, Naval/Mechanical Engineering, Electrical Engineering, and Space Systems Engineering at NPS. Postgraduate school carries a three-year obligation for the first year, then month-for-month thereafter.
So basically, from the SWO-EDO's I've talked to, I will spend my first couple of years doing SWO stuff, getting all my quals, etc., then I will go to schools to become more specialized in EDO community.
Thanks for hte support!
-Erin Leigh