I also went through the process and I can tell you that it doesn't move too fast and that you need to be diligent and on MPOC's back regularly to get it done.
ntvs is right you need to provide documentation regarding your academy content. The responsibility is yours to provide the info they evaluate.
So if all you tell them is you went to a fulltime academy in the State of EAST CUPCAKE they won't look into what the course of instruction was. They only look at what you give them so give them as much as you can to make your case. ( I personally think that they just like to make you jump through hoops. They wouldn't look at my request until I gave them tons of documentation but.... then told me that they didn't need to look at it because one of their staff was familiar with the state I was coming from so they knew it was ok!!)
If they find that your academy is acceptable you will be given an advisory letter stating that if a request for exemption from the MPOC academy is made the MPOC is likely to act favorably on.
The reason you get this letter is that only the agency that is going to employ you can actualy request the exemption. Don't lose the letter, it tells the agencies you apply to that the expemption is likely to be given.
There will also be conditions attached that you must pass the Mass Law Exam, be current in CPR, First responder and Firearms certifications.
Also, it must be less than five years since your last fulltime appointment.
If it's more than five years you'll need to do the MPOC Academy.
Feel free to PM me as well if you want.