Hi, thanks you for using our software !
No, sorry. There is not a script to create a catalog from multiple files, because each library may use a different format (single or multiple objects by file, meshes, groups, etc).
Forest lets you to import multiple models from a single scene
, but that's all.
Usually we have created our catalogs (HQ Plants and XFrog), generating the XML files directly. But in any case, it's not an automatic process.