Posting of FI document while creating FI document(FBB1)

Hello All,

I have a requirement where I need to POST another Accounting document while creating an document through FBB1.Let me make this clear:

Suppose I am creating an document through FB01 or FBB1 before or after it posts an document I need to use the similar data while I am creating the document and just tweak some entries(debit/credits etc..) and post a new document out of it.In short while posting one document through FBB1 or FB01 after I hit "SAVE" it should post 2 accounting documents(one of what I am entering on front end and other in back ground).I tried doing this through BTE's but even though there are no errors I am not able to create other document.I tried doing through BDC.I am not sure weather "BAPI_ACC_DOCUMENT_POST" would work here.I think after the document is posted I try to call my BDC than it should work but while I debugged I didnt find an exit or BTE after the document gets posted.

Could you help me please in resolving this issue or if there is any other good solution.

Thanks

DIGISH