[marshmurderer]

just use pump staging and pump that bad larry up to height and slide it in. that is the best way to get a bay/bow up to height. It also gives a work platform to trim it out and repair the siding around the window. If things dont work out pm me. im licenensed and insured and have all the neccassary equipment. ask the contactor about using turnbuckles to support it from the top under the roof/cap. It makes for a sharp looking job without the ugly(imo)brackets underneath which really dont work to well unless installed correctly. it isnt just simply screwing them to the house after the window is installed. good luck salty.