I also got the DCS set, and I spent some time trying to figure what keys go where. After examining Gadel's post, this is my best guess after examining his counts and pictures:
http://www.keyboard-layout-editor.com/#/layouts/bac5562be53557966065172a30bf96f2This layout is based on Signature Plastic's numbering.
I don't have my dox yet so I can't test this. The keys have writing on the bottom ("R1","R2","R3","R4"), but it seems to not match up to the document from Signature Plastics. It seems to be ordered the opposite: 43211 instead of 12344.
Hope this helps.
EDIT: It turns out I ended up with a completely wrong kit. The new, correct one I ended up with matches that layout, but the keys have no stamps on the bottom. They are also a slightly different color(darker than the old ones.) So please disregard the part about the opposite order.