Do It! I just (may have gotten lucky) squeezed by with a 78 on FAR after a month and 10 days of study (and I never went through advanced accounting in school..Im actually a comm major ;). Id say continue with the Becker, and get Wiley testbank and or Ninja notes and or Audio. Be reading/doing mcq/and re-reading minimum 6 hours a day, minimum (some of my days stretched out over 8). What has been said above is absolutely correct, the difficulty is retaining, and being able to regurgitate tons of material on that one day.
Id even go so far as to say.. focus on MCQ more than your Becker materials. As you go through the MCQ don't just answer and continue, answer…then understand. Allow the AICPA to pull you to the information they will probably focus on during their exam, then note what you don't think you will remember (and review these notes). I swear if you don't have the time to completely grasp 100% of the material (Becker way), then you should focus your understanding on what is most likely to be on the exam (MCQ released by AICPA, and..at least in my case, a good dose of ninja notes).
Also, focus on the weak points! If you have any understanding/memory of a subject in school.. pass it up, and pump one you have no memory of.
Finally, pray. You need to understand you are taking a chance here, and in all likelihood (unless you know this stuff before study) you will fail. Use it as a learning opportunity at the least, and remember this thing is all about perseverance.