Referencing calculated members in crosstab

Hi,

I have problems understanding the functions referencing calculated members.

For example, I need to add 3 calculated rows at the end of my crosstab. Having set row values to 1000, 1001 and 1002 respectively, I started to modify the Insertion Formula to have them sorted.

For row 1000 it reads:

GetRowGroupIndexOf(CurrentRowIndex)<>0 and GridRowColumnValue("MyRowIdx")=10

So, the row 1000 is put behind my last row 10. So far so good.

But which function can put row 1001 after 1000 and 1002 after 1001? It sounds simple but I just can't figure out: How can I reference a row by the row value I put in? Any help is appreciated!