>I'll let you know when I go for the exams, but I still need to study, I'm still VERY young :) and I'm searching for some help on what to study. I'm planning on buying the guide you wrote. But I still need to know if here in Brazil there are any certified training center for me to do the exam. Maybe in 1 yr or half I'll be doing the exams.
>Say, what are the main things MS focuses in that exam? :)

The exam syllabi are at http://www.microsoft.com/traincert/exams/70-156.asp and http://www.microsoft.com/traincert/exams/70-155.asp. Our book follows them pretty closely, and at the level needed to pass the exams. It also includes references to other study materials if you feel you are weak in some areas.

You can locate authorized testing centers at http://www.2test.com/index.jsp and http://www.vue.com/.