Jake,
DrPixie's comments re familiarity are correct. As far as I recall, the Flight Screening Program (FSP) is deliberately designed to avoid the candidate needing to know the detailed cockpit layout and checklists. Generally speaking (at least for the basic FSP), the instructor will complete all checks and radio procedures.
You will be briefed extensively at FSP on the required workcycles, procedures, techniques and airmanship points. In a reasonably short program, these are more highly valued by the ADF than the candidates' ability to know the checklists and switchology.
I also agree that some recent flying might help, but beware FSP will be demanding on very disciplined attitude setting, trimming and workcycles, so don't go out and just enjoy the view if you decide to get flying before you go.
Hope this helps.
VI