So suppose you have this PowerBook G4 12" (A1010 EMC 1986). Apparently it CAN have an internal airport (B) module if it was built-to-order. I'm trying to determine if this is the case for the particular PowerBook on my work space here. Is the "built in" completely integrated on the motherboard or is it a visible module somewhere? It can't be in the expansion slot because then it wouldn't be called "internal".