I'm well on my way to proving my complete stupidity...but, I'm getting nowhere being stubborn and trying to figure this out on my own.
I can't seem to wrap my brain around this whole process. I followed the instructions in the original message, and got...nothing.
I then followed Susan Ottwell's followup procedure, and at least got "no entries found" to display.

That's where I've been for 2 hours now.
So, here's what I've done:
1. I put the contents of the zip file into /assets/snippets/newsparserx
2. I created a new snippet called NewsParserX and pasted the newslisting.snippet.txt into it.
Then, I put [[NewsParserX]] into the template.
Nothing.
So, I followed the slightly different procedure spelled out by Susan Ottwell, and created a snippet called "parseNews" with the
return $modx->runSnippet line as it's only content, and put [[parseNews]] into my template. That gets me the "no entries found" output.
I can't seem to figure out, step by step, what I should be doing. And, the original instructions from Jason seem substantially different from what Susan did. What goes where? And, what should I put in the template?
Thanks. Sorry to be dumb.
Duane