Study Plan if F2 forgotten.

I am planning to give F5 in june 2014, I have to start studying yet but my base is very weak provided I studied F2 in 2007 and after that I couldn’t continue studies due to personal reasons. Now I have to study, I have pretty much forgotten what I had studied in F2 and as F2 knowledge is required in F5 do I need to study F2 first and then prepare for F5? if so which topics should I study please guide me as there is very less time remaining until the exam.