SSS offers a list of frequently asked questions about the PFS on their web site. I recommend giving them a read.
Important notes about the FA process:
Applying for financial aid is time consuming. Read through all information available from each school and from SSS. Do your homework. Gather documents and start early. Be transparent open, honest, and candid- in all your data and in your communication with admission and financial aid officers. Keep the FA officers at your schools informed; let them know what you're doing; ask them questions. In turn, they will keep you informed.
Remember, seeking financial is a process, not a recipe. The completion of the process will not produce a specific result. Schools award their own aid based on the competition for that aid. The amount of aid you might receive varies from school to school based on how much aid the school has available and the quality of competition for each available dollar.
The long and short- be prepared to receive more aid from a school where you might be stronger applicant and less aid where you would be in the middle of the pack.