Enhancing the MDG Analytics BI datasource

Folks,

I want to make a copy of BI Data source 0MDG_ANLY_CR_DATASOURCE and have the standard BI query 0MDG_CR_T01_Q0001 call the datasource. My requirement is to add a custom field to the data source, but structure MDG_ANLY_S_CR_DATASOURCE does not allow any enhancement to add new fields. Any help with this is appreciated.

Thanks,

Kartik.