Help prep for Converting FAA Commercial pilot licence to Peruvian Commercial Licence test.?

I have a FAA commercial pilot licence and need to get the Peruvian commercial licence. All i need to do is get some paperwork done and past two written tests along with the medical. Any advice for preparing for the written tests? Any books, software, online class, anything? Any info will help out a lot, im in a rush to get this set to jump into a better job. Thanks.