SO, I've spent much of the day soldering away, and I've almost got the MMC part connected up. It's hard going though, and to top it all I think my soldering iron needs a new tip - again. The more I do of this, the more I wish I had that milling machine so I could just make a new board! Soldering in the sockets etc. is nothing, but stripping and soldering the wires is a nightmare!
Any-hoo, once I've done the last few wires, I'll try the code I have for reading the card and see how close I got...chances are it'll need lots of tweeking to get it working right.