Maintaining different values for Accounting Type (KOART)

Hi experts,

I have several accounting tcodes such as FBV0, FB03, FB08, FV65,FV60 in one parent role.

FV60, FV65 are added to this role as FBV0 is checking internally for this authorization object. 

All these tcodes share a same object  F_BKPF_KOA which differ by activity and the accounting type (KOART).

The KOART field is an org level field defined by SAP and I have entered D,K,S as values.

But the auth object values should be different for the accounting types.

i.e  03 for D,K,S

     01,02,03,77  for S

     03,77 for K

All the derived/child roles for this parent should also have the same document type as the parent. How can I achieve this as this object is maintained at the org level.

I could not delete this obj from being an org level element as it is defined by SAP.

Appreciate your response.

Thanks

Kee