My situation was a bit different from your case: I had failed FAR in December, and set the retake for late January before busy season really hit (I'm working full time). I had about four weeks to study, much like you, and passed in January. Taking notes works really well for me, so NINJA was a really good approach. Here's what I did with my NINJA subscription:
I read through, and re-wrote the NINJA notes (these are closely based on the blueprints). That was the first thing I did–it forced me to consider what I really didn't know and needed to re-consider. This also gave me a different perspective from my prior studying (through Becker).
Immediately after re-writing the notes, I worked through 100-200 MCQ each day. FAR is tough, so these questions took me between 3-4 hours each evening. Studying full time, you should be good. I made sure to add something to my notes whenever I missed a question (I re-wrote notes weekly, but you may not like that idea).
I didn't actually work through any sims. I had already taken the exam and had some idea of what they're like. I also didn't have access to any of the lectures at the time…it might be worth listening through these if you need to drive anywhere or go for a walk.
During lunch at work or a commute (when I wasn't driving!), I was working through the flashcards nonstop.
One thing I wish I had done was to run through the online (AICPA?) practice exam–I've heard others say that it is very helpful.
Good luck–full time in 28 days can be done.
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