BOM explosion in Sales order with material variants

Dear all,

we would like to work with Variant Matching in the Sales Order. Additionaly we would like to explode the BOM....according to the SAP help this is not possible....

http://help.sap.com/erp2005_ehp_06/helpdata/en/bd/05a7d69d3211d190380000e8a49aad/frameset.htm

Does anybody of you has any ideas how and where to make this happen?

Thanks for your help and kind regards

Jan