Hi,
Well, it's important to understand the current design and also what exactly you want to achieve. Root and Home nodes are different nodes in Kentico
CMS, and if you wish to display "Home" in menu, ensure that "Show in menu/navigation" is enabled for Home node (that's present in sample Corporate Site), not for root node.
Another thing is to have the home node with url matching the main domain - like "www.mydomain.com". It is possible to achieve that using several steps (redirection, web.config setting, etc.), depending on the IIS version you're using.
Does it make sense?
Regards,
Zdenek