Thanks for the positive feedback, everyone! Jim, I'll put the Leach Brown Lenox on the shelf just under Wags... as unattainable.
As for the process, I gently peeled the the cards in half and laid them all out on the scanner ... took the images all in one pass, carefully glued the two halves back together again and re-inserted cards back in the slabs (where relevant, of course). I think I got them all back in the right places...
But seriously ... for those that have asked, I use Paintshop Pro for both scanning and processing - any image editing software will do. This is simple scan, crop, save, and so forth. Combining images to make a composite is also easy. If you have a little bit of programming skill, there's much more you can do...
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Mike