It really is everything haha. I suggest getting the MEI PTS and start with that. Start going over all the areas in there. Also, like any PTS there is a list of references / books. You basically can be accountable for all the info in any and all of those publications. The more you read / study before you get to the CFI school the better off you'll be. It's a lot easier to fine tune your knowledge and skills then to have to teach everything to you. The ones you'll spend the most time with are the PHAK, Airplane flying handbook, the instructors handbook, the pts's, and there a couple of the AC's that you'll spend some time with IE, 61-65 for endorsements, and the AC on spins. The CFI is a lot of work, no way around that, but once you get it and start instructing, you can really learn how to fly! haha.
The FAA still has to assign you a DPE (if you are even in an area that will allow that). So the whole 2 week thing will really come down to that, and when they are available. Also to note, the 14 day or total CFI doesn't leave you much time in the airplane. If you don't think you can perform all the maneuvers in the pts... to better than commercial standards... while in the right seat.... while explaining them... in 2 flights, you might really want to consider a program with more time.
As for the original question, can it be done in 2 weeks? Sure it can. If you know your stuff.. in the classroom and airplane... if weather doesn't screw you up... if you always have a plane... and if the examiners aren't too booked. Sounds like a lot to play on, but its doable. The biggest factors are on the student really.
Hope this helps! Let me know if you have any other questions.