Just got done with the new layout since Docking Panels are out of the question. Also got half the EQIDL classes set up for the property grid now.
Here's the screen shots of the layout i'm going with. This layout is thanks to Phil Wright for writing the Krypton Control Toolkit and keeping to use of it free to public.
Layout - Property group collapsed
Layout - Both groups collapsed
They can be expanded and collapsed by clicking the arrows in the heading on them.
Getting very close to the first usable release. First release wont have the visual preview in, because I'd like to iron out the bugs in the actual data side of things and the xml editor itself before I even both finishing the graphics library.