Gl Postings

Hi all,

I am an abaper who has been saddled with the responsibilty of doing something which i think could be done through functional customizing. My Challenge Goes thus

I have a requirement to post an accounting entry into 2 gl accounts when a migo (Good Reciept [both posting and rversal] ) is done on a particular type of purchase order (this is apart from the normal ones which have been added by the MM person). This I did through a BDC program on F-02 and added it through an enhancement. But now, the requirement is that the DOCUMENT NUMBERs of the normal accounting entry and that of my new posting should be same so that when they click on accounting documents for that particular migo, it should display all the postings; both the normal one and that which i have just added. I have tried all i could but have not gotten a right way to do this.

I really think this could be done by customizing, but not sure, can any body please shed any light if this is possible through customization????