BW Hierarchy Problem

Hello, I have a strange scenario. I am working with 0CUSTOMER hierarchies. I have one DSO which has 0CUSTOMER and NodeID. All customers have thier NodeIDs associated with them. This is what my 0Customer Looks like:

Node1
- Node 2
  - - Node 3
    - - - Customer 1
    - - - Customer 2

In my DSO, my data looks like this:

0Customer      NodeID
Customer1       3
Customer2       3

I can hard code it only once but i want to know how to keep my DSO maintained and in line with 0CUSTOMER infoobject Hierarchy, so if some body changes Customer2 from Node3 to Node2. I want my DSO to say the same thing like:

Node1
- Node 2
    - - - Customer 2
  - - Node 3
    - - - Customer 1

0Customer      NodeID
Customer1       3
Customer2       2

What will help in this scenario is a table which has NodeID associated with it's children. something like:

Node1

Node2      Customer2

Node3      Customer3

Does any one know how to achieve this?

Thanks.