How to enhance value node in the context

Hi,

We are working on CRM 5.1 UI . I have a requirement to extend the table in the standard view of component BTFSCOA with an additional column (check box).

The attributes are part of value node.

I've tried to enhance the component by using a enahncement component in BSP_WD_CMPWB ( bsp component workbench) . But not able to extend the attributes of the value node.

Can some one guide me as to how can this be acheived ?