Merging/combining RT instances


I have two RT3 instances (two MySQL databases) I’d like to merge. Ticket
IDs are unique between the two, but everything else is not (queue IDs,
groups IDs, etc.). It looks like I may end up working backward through
the schema, recreating IDs and links, which seems non-trivial.

Has anyone else done this? I’ve seen this question raised on this list
in the past, but never a solution.

Thanks in advance,