Parent child Hierarchy - name column

Can anyone suggest the following.

I have Parent-child hierarchy(SSAS 2008 R2) with the attribute names as NodeId,Node Description and ParentId. The whole hierarchy works well at the moment. The suggestion i need as I would like to display the unique value as [Organisation Hierarchy].[Organisation Hierarchy].&[UK Life Staff Pension Scheme LE- SPS1_SPS1] instead of [Organisation Hierarchy].[Organisation Hierarchy].&[510].

I tried to change Name value for ParentID attribute but didn't get the expected result.

Also tried memberUniqueNameStyle property in cube dimension to NamePath. In this case, i got the full hierarchy path as [Organisation Hierarchy].[Organisation Hierarchy].[Group].[Region].[UK Life Staff Pension Scheme LE- SPS1_SPS1]. I dont want to get full path of the hierarchy.

Thanks in advance!!