no, schools are much more than a way to divide up majors. the requirements of each school in terms of general education are almost entirely separate. if you want to switch to a different school, you need to go through the internal transfer system. read more about that here: Office of Internal Transfer
I don't know the specifics of AAP, but I imagine if you wanted to take a few courses in the humanities it would be possible. you can't major in a humanities subject while still being in AAP though.