With more time on my hands than I probably should spend on this (being retired), I decided to preserve the indispensable advice posted here in a single PDF guide (attached). After all, Geniatech could kill this Forum without notice, and I'd hate to lose this information. Sorry, but the "enter your info marked in red" color failed to transfer from NeoOffice to the PDF, but I also used brackets so you'll be able to see it. Please be sure to call any errors to my attention so I can fix them, but I have tested everything and it works.
IMPORTANT: this guide applies just to Macs (I don't know the Windows world), and to using xmltvlistings.com as the North America EPG source (which is what I am doing). Maybe someone will do a similar guide for schedulesdirect.org.
Again, thanks to everyone who has contributed to this Forum! [I'm also posting this on the other Forum thread discussing these issues, specifically on xmltvlistings].
XMLTVListings EPG with EyeTV-Guide.pdf