import Microstation Title Blocks in Attribute Exchange Rules from another installation


I need to import Microstation Title Blocks in Attribute Exchange Rules from another installation without overwriting the existing Microstation Title Blocks.

This requires that I export both setups to .ini files and then merge them to one somehow. I have tried to do that, but I am afraid that I might damage the existing mappings.

Where can I find a description of the .ini file ? Is there any guidance as to how to merge .ini files ?