Yeah, I know it will take a lot of effort and time. Im dropping down light too, It would be very difficult to take a full load or close to it and be trying to study for the MCAT–and do well in both.
I need to purchase a few or more of those practice tests from AAMC. From the practice sections I have taken, you are given a passage with info, and it is testing the underlying knowlege/concepts of the basic science pertaining to that passage. So I guess as long as I can get good at figuring out what is really being asked, I will have accomplished a lot.