I didn't have very many psych questions on my exam. Like maybe 5. They were stuff like delusional disorder etc etc nothing too complicated. If you know the definitions of the common psych disorders as well as the time frame that differentiates them (Acute Stress vs. PTSD or Schizophreniform v. Schizophrenia) then y ou're good to go. If you have time, pick up HY Beh but otherwise, FA, IMHO, is enough.