Project #47583: Window Repair

This disabled senior neighbor uses a walker to get around. She had purchased new windows for her 900 sq/ft single-story home, and her son was going to install them for her. He was able to install one, but then had a stroke and can no longer do the work. She has 6 windows left that need to be installed. They are new, and covered in her barn. Any help with this would be greatly appreciated.