How to extend a Generated IDoc(CRMXIF_PARTNER_SAVE_M02)?

Hi All,

I need to extend an IDoc CRMXIF_PARTNER_SAVE_M02, I created segments but when i try to append these segments via WE30, i am getting error like 'Action not possible for generated idoc types'. I found that these kind of generated idoc types to be extended using BDFG/BDBG, but in these tcode i need to give Business Objects related to that idoc, but i dont know from where i can get BO related to this IDoc CRMXIF_PARTNER_SAVE_M02. Even if i get related BO, how to enhance that BO/BAPI. Any clues/ideas to extend this idoc?

Thanks & Regards

Gokul Ragunathan