i would suggest NOT trying to review all the material before starting to take full-length exams. i would suggest starting to take full-length exams NOW, regardless of how comfortable you feel with the material, for the following reasons:
-from what i've seen (from 4 kaplan full-lengths and a diag), relatively few of the questions actually require that much actual knowledge. a basic understanding of the concepts is usually enough to get u the right answer. sometimes, u don't need any science knowledge at all. you can eliminate based on common sense, or at worst, eliminate 2 choices so ur chances are 50%. the answers to most questions are in the passages anyway, so what u really need to practice is just the act of taking the test.
-most importantly, u don't actually LEARN the material until you are forced to do MCAT style problems using your knowledge. i think u can review till the cows come home and the first time u do a problem u'll still find it difficult. integrating full-lengths into your practice ASAP will infinitely enhance the review of the material. it also points out ur weakpoints, so u know where to focus ur time
this is really the most important piece of advice i would give to anyone prepping for this test. i've taken four exams, and with each exam my score has gone up 2 points.
seriously, in my opinion, forget review, drop everything, and take a full-length NOW.