Vik, I'll try and get some images of the rack, but my camera's playing up at the minute, so it may take a few days. I can describe it now, though. It's ostensibly like a conventional rack, except longer. The plastic deck bolts onto 4 struts which run between the two side arms.
I've managed to fit a foot deck - I'll also post pics of that when my camera's working properly. It's mainly for my daughter to keep herself stable with, and works really well. You could use it for stabalising bulky items, though I wouldn;t use it to carry heavy items, as it bolts onto the chainstays and has no support from the rack itself (though it wouldn;t be hard to do, if one put one;s mind to it).
hope that's of help for now.