How long would it take to prepare for the GREs and how difficult was the exam?
The test is long and draining. By far the essays are the worst part because it is hard to prep for them. Other than that, the test wasnt to terrible. Its just like the big brother of the ACT and SAT. If you did fine on those, dont worry too much about the GRE. The best way to prepare is to go out and buy a prep book, make sure it one that comes with a CD that has practice test. Those practice tests are really want get you prepared for the real GRE. Take tests, lots and lots of tests.
Also, check to make sure that it is the General GRE that your school wants. Some schools want subject specific GREs.