Others have claimed that it is definitely doable in 2 weeks (i.e. you can do all the problems from cover to cover in 2 weeks), but I personally don't think 2 weeks will allow you to take full advantage of this awesome DAT tool - unless you get nearly every question right on the first run, you really need to be able to review each question, read through the answers thoroughly, and understand why each incorrect answer choice is incorrect. If you're efficient about it, I think this is possible in a month's time (studying several hours each day).
Of course, this is only my opinion, and others may say that this strategy is overkill, but it certainly worked for me. 😀