Create Sales Quotation for Sales BOM of configurable materials via BAPI

Hi,

I have been trying to create a Quotation for Sales Order via BAPI_QUOTATION_CREATEFROMDATA. The materials I need to work with is configurable materials so user will need choose characteristic values as configuration. I already get this working with ORDER_CFGS_* tables.

However we also have Sales BOM of which consists of multiple configurable materials, mostly 2 configurable materials, as its child items. When I submit just the Sales BOM material (SET material) via the BAPI, the result is that the system automatically expand the child items for me, so I ended up with 3 materials, which is good but I cannot pass the configuration in since the SET material is not configurable.

Could anyone please suggest how I should approach this ?