What's the easiest way to use vertical and horizontal splitting in Visual Studio at the same time?

Question

As seen on the screenshot below, marked by red arrows:

If I use Vertical Tab Split subwindow, I lose the ability to split insert another tab and split it horizontally. Is there any addon or setting I can change to be able to put my code tabs in sort of rectangle-grid?

Just to clarify - I don't want to see the same file contents twice. I want every tab to show a different file. I can't find the reason why such an oversimplification to ide was introduced.

I know it can be solved by opening many standalone windows, but that's hardly an answer for me.

Here's the example of how it looks like in Sublime 2

Answer 1

As you have discovered it's not a feature of the VS shell. For reference, it wasn't possible in VS2010 either.

You can vote for this feature on the Visual Studio Developer Community site - there's a specific request for it here