Hmm. I hadn't paid much attention to the scanlines file, mainly the screen tilts.
Thanks to this, I noticed that for reasons unknown, the crt-geom folder is hidden and not easily gotten to. If not for that, the easy solution would be to copy the scanlines*.png file to there. The folder isn't showing as hidden once you get to it, but Win 7 doesn't list it in the chains folder. ???
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I have officially retired from sucking at everything I do. Life is much easier now.