matching roof - double case window

[georgee]

A few months ago I posted a question about how can set the shape of my windows and somebody directed me to "Windows Specification -> Shape" and I was told to play with the different settings till I find the right shape for me. It worked so well!

However, today I did it with a double case window and I wanted to change the right side of the window and the software switched back to a fixed glass window.

I posted two pictures, you can see what I need and what I'm having now..


Do you have any better ideas? Maybe a great solution?
Please let us know.


Georgee