If the infection is in the insulation? then its got to go. you may be in over your head with this stuff. do your home work be for you do anything with this. but dont overlook the insulation. you can paint everything before you start. that will contain the spours. cover all duct systems.

just cutting in some vents and moving the insulation around for the vents is enough to kick up the dust and spours and send them every place in the attic/house.

start with some of your own air test. find a lab and get the Proper ID of this mold then you will knownhow to handle that mold type and if its a health type or not. This may be over kill but you ask.

Best

Ron