different assignment block for attachments

Hi.

In standard the component for opportunity (BT111H_OPPT) calls for attachments a view DocList (in component GS_CM). This view does not show folders. On the other hand the view DocTree in the same component GS_CM shows the structure (folders and attachments).

I saw that in run time repository for opportunity (BT111H_OPPT) this component calls GS_CM component with interface window MainWindow wich has the inbound and outbound plag set to 2DOCLIST.

So, how could I change this logic, that on opportunity I would have under assignment blocks available also DocTree assignment block of component GS_CM and not only the defautl one.

I tried to add new ComponentUsage or ViewSet in Runtime Repository, but I don't have available view for DocTree.

Anybody knows the solution?