Cheers for the reply.
I must say, I couldn't find any way of doing it, but the main reason I thought it may be possible was that, I read a review of Aperture in one of our main photography mags here in the UK, and there was a screen shot of what looked like an arranged light table, with 4 or 5 images, on a completely black background. The caption with the photo even suggested that that was what it was. And I'm sure it wasn't just the editing screen, because the images were all of different sizes, and in an arrangement.
I'd be interested to hear yours, or anyone else's thoughts on this.
Thanks again 🙂