If you're struggling with Launchrock's dated How-To articles and trying to get your custom DNS setup in Namecheap, here's how.
From the Launchrock side of things, set it up as follows:
Do not put "www" into either of those inputs. Verify availability and Publish (assuming you're good to go with the rest of your content).
From the Namecheap side of things, add the following entries:
The last entry redirects www.newproduct.com to newproduct.com. If you try to do it the other way around, it won't work.