I also get a 403 trying to load what you've linked, but dosbox_13.nmf loads fine and so do the games. It determines the filename based on the major version num

I also get a 403 trying to load what you've linked, but dosbox_13.nmf loads fine and so do the games. It determines the filename based on the major version number in the useragent - it would probably work fine if your browser reported chrome 13.something.