Window installation question???

[bigcountry]

Has anyone ever installed replacement windows in new construction?? I picked up 1 yr old replacement windows for $20 each (couldn't pass up this deal), but the problem is that there is no nailing fin. What is the simplest way to get passed this?

[MaineRhino]

Some of my windows were replacement without nailing fins, but the windows had channels which flexible nailing fins slid into. Most window dealers carry rolls of the stuff, purchased by the foot.