[header] How to replace old double hung windows with vinyl replacements [title] The only thing you require for this diy project. [step] Hammer, cordless drill, tape measure, caulk gun, level, pliers, putty knife, utility knife & protractor [title] Remove the first sash. [step] Pry off the molding around the window. 
This is usually three pieces of either shoe molding, quarter round, or some other thin decorative wood. Once removed, the bottom " sash " (another term for window) will have the ability to swing outward into the room.