rolled insulation and panels advice needed !!!

[KenCo]

I need some expert advice on installing 6' by 110' rolls of fiberglass insulaation with white plastic backing and nylon supported. I have built a 60' by 90' barn for a local vet. The center hgt is 14' and at the eave 11'. The rolls will go on the 90' run. I'll have approx 20 feet of roll left over from each roll. We will use a new roll for each run and not worry about the left over. My question is does anyone have an idea on how to get the insulation up over all the cross members of the roof ? The cross members are 6" c purlin on 4' centers. also, once the insulation is in place, then I'll have to place 2 pieces of overlaping r-rib paneling on top of it on both sides of the roof plus a peak sheet on top !!! Again, the barn is 60 feet wide and 90 feet from eave to top center to eave. Any and all suggestions will be appreciated.