Welcome to the forums.
Im just a little fuzzy about what you have and what you are trying to do.
Please forgive me while I stumble around a bit here and ask a few questions......
You have an existing PAC Display project with one controller, and you are trying to copy the windows you already have and attach them to a new controller?
If so, copy the window, name it something new.
Now you have two windows that look the same and are attached to the same controller.
Click Configure -> Control Engines.
If the new controller is not added to the PAC Project yet, here is where you can do it from.
You will have to call it a different name, and of course it will have a different IP address.
It can have the same strategy name.
Once you have configured the new controller, you will have two controllers for this PAC Project.
Go to the new window and right click on some space (not on an object or text).
Click on 'Select All' from the pop up menu.
Now, right click on an object, from that pop up menu, click on 'Replace'.
From that menu, you can select the old control engine, and then the new control engine.
Click Ok and BOOM!
All the graphic points on that window will be attached to the new controller.
If thats NOT what you are wanting to do.......
If you are trying to make a whole new PAC Display project, but with a different controller......
Much the same.
Copy your current project into a new directory.
Open it up.
Configure the new control engine.
Window by window, right click, select all, replace and swap controllers.
Once all the windows are done, you can (if you want) delete your old controller.
If that's not what you are trying to do..... then lets know and we will see if we can help.....