Look into using the downloader to update all non-arcade stuff

[city41]

The downloader looks like it can be configured to update everything except arcade games using filters. This looks promising, as AMMiSTer can just stay focused on arcade games (which is what I would prefer), and the Downloader can handle everything else.

If this works out, inform AMMiSTer users how to do this. Maybe even an option in AMMiSTer that can setup the downloader with the filter set.