Examples of the box part of the tests are at
http://myweb.tiscali.co.uk/radar2001...lreasoning.htm. That said, they're only an example of the cubes, the real ones are slightly different. You'll get three or four 'flat' cubes, and 10 or so multiple choice questions on each.
Don't worry about the tests - just do your best and work as quickly and accurately as you can. You won't have enough time to finish most of the tests, so don't be disheartened by this. The only test you can really prepare for is the motivation test using the material you've been given.
PM me if you have any more specific questions. Good luck!