One thing I don't understand is how Perot helped Clinton to win Georgia and Montana, but not even Florida?! Maybe I'm just looking at this from a 'now' perspective, but it certainly seems weird that a key swing state stayed for Bush, while two very safe Republican states switched over.
Georgia was still very much in touch with its "yellow dog" roots in many areas at the time. Only the suburbs around Atlanta were reliably Republican. Clinton's southern appeal was strong enough with voters, coupled with Perot on the ballot, to narrowly win the state. Perot also siphoned off a big chunk of voters in Montana. Also, Montana was not even a strong state for Bush 41 to begin with. It only went for him 52%-46% in 1988, defintely not the big wins that his son had there.