I am sure a happy man on passing the exam. Thank you very much. As you have already cleared IBM's UML exam, i believe part 2 is not very tough. I too does not have any prior architectural experience on j2ee, but 2 years of development experience of it. You just concentrate on part 1 first. Once you clear it, i dont think it would be difficult to do the assignment. This group is very good group and you get all the clarifications instantaneously by the fellow ranchers.
So, my advice for you is to concentrate on part 1 and then think of part 2 and 3.
All the best for you.