My son and I put in the windshield. Decided to start at the center bottom and let gravity help. It took about 15 minutes start to finish. We only had to apply some judicious slapping to the driver side top corner to get it to seat. I found the lip slipped easiest when I pulled the rope at 90 degrees to the gasket and kept my hand close to the window. I used soapy water for a lubricant.
In my opinion this is a job that can be handled by two careful people.