Remove the lower sash (Image 1), the middle piece called the parting stop (Image 2), and slide the upper sash down (Image 3). Cut the ropes, and pull the upper sash out. Remove old pulleys (Image 4).
Route a groove in the window to receive the pin to connect to the jamb liner (Image 1). Cut another groove for the weather stripping. Tap the stripping into place with a hammer (Image 2), and install the windows (Image 3).