How to override Member Insertion Filter of a report

Version: EPM 10.0  NW

We have EPMDIMENSIONOVERRIDE  to override dimension member selection for a report definition conditionally and at runtime.

Similarly I need to conditionally set the EPM member insertion filter selections . I will have to setup BAS(node1)  or BAS(node2)  for member insertion filter of a dimension which is on row axis based on some selections on the excel.

I didn't see any excel function or VBA api for it.  Did i miss it or how do you recommend to achieve it.

~Dilkins