....will it always pop up in window (as in the microsoft window that goes around it) (seen on your preview shots) or will it be more like the PMDG one.

no, it can be "docked" or "undocked" as every other partial panels (overhead, pedestal, MCP ...)The undocked way is used mainly for multiple display settings. It was my case when I took the screenshot. It why you see it undocked.

thanks a lot for the info. can't wait for this bird, and to fly one of Gary's famous DAL paints!