There is this project that is building the gamelist and art based on the output of my scraper and other sources https://github.com/recalbox/recalbox-gamelists It requires that things are named like no-intro set.
Another option is to run my scraper from another system and just copy over the gamelist and images. I make versions available for almost everything (I don't have FreeBSD but now that I'm running that I may add it)
You can download here:
https://github.com/sselph/scraper/releases
And the basic instructions are unzip the zip and place the scraper executable in the rom folder and from a command line change directory to the rom folder and run ./scraper or scraper.exe on windows. That will create a gamelist.xml and images folder that you can copy over.