If you want to apply the MSCD enumeration scheme to your contracts, Ken Adams recommends that you consider using the Numbering Assistant.
But the Numbering Assistant won’t help you format the unnumbered paragraphs at the front and the back of the contract. And some people won’t want to bother with the Numbering Assistant. So you might find useful the following Word documents:
[Updated 8 October 2017: The fourth edition is about to come out, so we’ve been … preoccupied. We’ll update this page by the end of of October.]