Hi there,
launchbox handles theme complete different. There some fullscreen videos which are recorded hyperspin videos and so. This is something you could use instead
the media think is, you can link to the folder. Art is mostly available through the importer. Not every art will automatically recognised because sometimes the games have a slightly different name in launchbox.
maybe a good to start with importing the games into launchbox and then scrape the data from the launchbox games dB and emumovies. Later on you can fill the gaps.
that was my movement