LUA script - Creating a list of parameter pairs

[SN1974]

I'm looking for a way of specifying one or more parameter pairs for my script to loop through. Each pair would consist of a source and a folder path from the host file system. At first glance I thought the list box created by obs_properties_add_editable_list would be an option - but I don't see a way of setting that to specify more than one field and no way to create a combo list of scenes, or a way to set it to select a folder instead of a specific file.

Does anyone have any suggestions?

Thank you
SN1974