OpenPlant Specification Generator - Converting from PSDS spec/catalog

I'm looking for some documentation that shows how to convert a PSDS spec and catalog to an openplant spec/catalog. The help files provide the steps for AutoPlant to OpenPlant but give very little information on PSDS to OpenPlant.

The sort of information I am seeking should cover

  1. What PSDS files are needed
  2. What settings are required when connecting to the PSDS spec
  3. The steps required to do the conversion.