Hi ,
Not sure on your question.
Is the Enhancement already done and you want to check whether it is done in BADI/CMOD.
Or
You want to populate the Data using BADI/CMOD.
In any case you can use CMOD or BADI to populate the data ,the recomendded is BADI which can be created in SE24..you can google for some Docs on its creation and steps to be followed.
And if tis CMOD you have to create a project and then write the code and for that also there are DOcs avaliable.
Rgds
SVU