you can setup them from your google webmasters tools for google..
You can't! Google has to first decide that the root URL of the site warrants having sitelinks, then you can 'demote' a URL from sitelinks but you cannot 'promote' a URL to be a 'sitelink'
As with all things search engine related , you can only turn off certain features, or
prevent search engine user agents from accessing your URLs. There is no way of making things happen.