You need to calm down and look through the forum.

2nd page of this forum, this thread:
http://www.larian.com/forums/ubbthreads.php?ubb=showflat&Number=427110#Post427110

When you use each orb, it'll give you a riddle for where to place the orbs, down in the basement of the academy. But that thread will tell you the ones you might not be able to guess anyway.