Mass upload position hierarchy

 Hi,

We've got over 10,000 positions, but haven't built a position hierachy, which we need to do.  We do have an (incomplete) supervisor hierarchy.  Are there any tools available to load a position hierarchy - maybe from a spreadsheet?  If so we'll use our supervisor hierarchy as a starting point, as we think there is around 80/90% match between the position and supervisor hierarchy.

But if there are no tools, then do we have no option but to assemble it manually using the diagrammer?