I took that test a few years ago and it was surprisingly easy at the time. I used BrainDumps and Transcenders to study.
Here's a link to download some study guides from
Cramsession.
You can always find sample test questions from a bunch of different braindump sites. The questions are usually very close to those seen on the tests but since they are submitted by users, the answers are not always correct.
Good luck,
-Icculus