tab index and controls sequence with group boxes VS.NET 2008

Hi there!

After microsoft changed tab index system for form objects, from sequential to hierarchical, I started having some issues.
Does anyone know if there is any way to navigate from Text box1 located in Groupbox1, to Textbox2 located in Groupbox2, without having to jump through all other objects in Groupbox1.
I cant simply remove group boxes, because there are actions related to them such as validations and sometimes they are disabled.
Form structure is like this:
Menu and status bar.
Top half of form that contains a couple of objects such as combobox, textbox etc.
Bottom half of form that contains tab control with couple of tabs.
Almost every tab contains a couple of group boxes with other common controls in them, and some controls that are not in any group box.

Any suggestion how to do this navigation?

Thanks a lot!