i
finally got the fucking nrg files to work.
well, three out of the four. it seems the first file is problematic, which is why i couldn't access it. the other three work fine, so i'm trying something else to sort out the first file.
typical aspie - couldn't get past the first hurdle, even though the other ones were easy peasy.
still, at least it means i'm not a total moron, as i was thinking i was.