Enhancing falgflexa data with customer , vendor ,asset no

Hi All ,

We are using ECC 5.0  .We want to fetch g/l line data to SAP BI , for this used  0fi_gl_4 data source.

0fi_gl_4 is fetching normal g/l line items ,but we are using new G/L (document spliting ).

To make this , planning to use generic data source based faglflexa table & want to enhance generic datasource based

and want enahance generic datasource with additional fields (asset , vendor , material ,palnt ,customer )

want to generate result as similar to 0fi_gl_14 in ecc 6 .

Need all your valuable inputs this design

thanks in advance .

Regards,

hari