I already gave you MY solution. I'd not sit there and figure out a smart semi automatic solution for days. I'd just do it. By hand I am personally not using Unwrap Pro. I maybe should give it a go. But this is a company internal guide, not everything in there is done by me personally.
Aren't you glad you got shot of us?! Have a great day folks. Whether it's bbq-ing and fireworks or just chillin', enjoy the independence from work for a day!