[@Dark Cloud]True, but I wonder what level of technology they would have, and just how human-like they would be size-wise/proportion-wise. 

In the original PoA, they had clothes and guns and stuff, and a society closer to that of humans. In the newer movies, for example, they seem to pretty much live just like regular apes (or, without bui8ldings and things, and are anatomically the same) but they can use technology and stuff. 

From the description of the Orangutans, I think it's the latter— more like regular apes that are just smarter