I have finally taken Alex's advice and have started to run those break-in images. Turns out that there's a version that will go on a memory card. I simply put the files on the card, slipped the card in the TV, and started the slide show.
What inspired me to do this? Well, after watching Hunt for Red October on Netflix last night, I turned the TV off at about 1:30am. There weren't any lights on, so the room went dark - and I could still see the menu on the screen, and the letterbox area from the movie was still visible. The carpet isn't exactly new anymore, but I'm still happy that I didn't actually wet myself when I saw that. Hopefully that's normal, but I started running the image retention screen wipe after that, and now I'm running the break-in images.