Have you done the Kaplan blue book yet for the PAT? Because if you haven't I suggest really looking into it. It builds confidence and the basic skills that you need for the PAT. Once you build up the confidence and that basic skill set along with looking for strategies that are found in SDN for the different sections of the PAT you will be able to practice those strategies with Crack DAT.
Crack DAT is not something you learn from in the beginning. You can only attain that knowledge through doing there practice tests over and over making yourself familiarized with the format of the real PAT. Thats what I believe the real usefulness comes from for Crack DAT. Let me know if you have any more questions
Links that might help:
predds.net (look for PAT strategies here)
Ross's pat videos:
http://forums.studentdoctor.net/showthread.php?p=11020986
My wicked sick pat tutorial:
http://forums.studentdoctor.net/showthread.php?t=528643
These are all sources where you can learn strategies from and apply them to the practice tests given in Crack DAT