@ ccpjc That's basically what he did with the "tickets" one.
Unfortunately, there's no way to do this on the server end that I'm aware of because DNS wasn't designed to operate that way.
Adding a hosts file entry might not also work because "help" is not a valid domain, so I doubt it would be processed as a hosts entry.
The closest you can get without hacking the browser up to accommodate this is to change the A record to help.yourdomain.com then after visiting it for the first time, they can just type help and choose the auto complete entry.