I've finally got my media play set up this morning. Lots of faffing around with remotes and SCART connections, but it is now hooked up and running. YAY!
I do have one small issue: The videos don't scale correctly. When playing a video, they sit in the middle of the screen, scaled down from what I would expect (using approx 50% of the screen) and no playing with scaling controls changed that. I didn't have time to go through everything, but it wasn't working as I would expect.
In addition, I imaged the SD a few weeks ago, and I see that RC5 has been released since. Is there a way to upgrade without reimaging? I also can't find the Pi-specific settings menu I have seen talked about elsewhere.
Really I don't have to reimage. It's all nicely built up now, and I will have to dismantle to get the card out.