Newsbin 6.54 has a new feature. Instead of clicking the + icon and reading the NFO files with Ctrl-R, if you select the main item and hit Ctrl-R. It'll look through the files and try to download all single part files which should include all this. It also downloads the first small PAR, parses it and shows the filenames for files in the PAR.
The purpose of this isn't just to look at NFO files but, to probe some of these obscure formats files to see if you can find out what's in them.
Talking to some users, it's clear they don't know about this feature. If you see the gray I icon on the file set. That means Newsbin has ID'd the set to contain information files you can read.