Add and modify Breadcrumb in a custom doctype

Hi. want to add Breadcrumb in a custom doctype.

I have 2 custom doctypes. Doc 1 and Doc 2.
I have a link field in Doc 1 that is connected to Doc 2.
When i click on that link field in Doc 1 it is taking to corresponding Doc 2 form. here Breadcrumb showing as App > Doc2 But i would like to see the breadcrumb as App > Doc 1 > Doc2 because Doc 2 form is opened through Doc 1.

Is it possible ? Can anybody tell how can i achieve this ??

Hi. Did you ever have any luck with this? I am wanting to get the same sort of effect getting my custom doctype to point back to the standard Support module.