Import content to nodes and populate Relativity?

This module provides a lot of relational power. Great stuff. Yet it seems liek the paradigm is to install/configure and then start adding nodes ONE AT A TIME...I'm wondering though how I can best implement a site with lots of nodes already in a relativity-friendly graph.

Eg, I have a collection of content types all set up in a nice heirarchy, and I have defined all my relations between the types.

Now, I'd like to systematically import the content (several hundred nodes) which has been carefully prepared and stored in .xls.

Starting from the top content type I can do the first import and get a set of NID values, which could then be used to populate the "parent ID" for each of the children while they are still in their .xls. Now I can import the children, and they come in with a parent ID. Now the children have NIDs, and I could export these, assign them to their parents. and re-import (update) the parents.

And so on down the line....

This could save heaps of time since each parent could have several dozen kids in my scenario.

I know it sounds a bit daft, but otherwise what am I to do with a structure that Relativity handles beautifully...but I've got hundreds of nodes to get started with?

Now, at the moment, when I try to use content import, I can't see any Relativity fields...thus I can't populate via a nice import module.

Just a thought...if I don't hear back within a few days some poor chopshop is going to get a contract to copy and paste for the next week....

Cheers!