Nice one, Joe!
My husband and I successfully installed two new bedroom windows at the weekend, with three more to go, when it's not raining, and before the winter kicks in! We've done it before, some years ago, and the windows aren't too big, fortunately - but I still think I'm too old for stuff like this.
The Good News - for me at least - was that I helped from the
inside - while Pete worked from a scaffold tower
outside 
In case you're wondering... Pete hates to pay out lots of money for jobs
he we can do
himself ourselves. Pete hates to pay out lots of money for anything, come to think of it!
Jayne