Comment by kjaftaedi

Your comments give me the impression this isn't totally clicking just yet.

All that is necessary is to add an entry in your hosts file for hidusi[.]com that points to the IP of your existing server.

That's it. Step completed.

No localhost, no new site, just using what you have already.

In the event you are filtering hostnames on your web server, you would just add hidusi[.]com as another alias.

Please let me know if this is not clear because I believe understanding this concept will help you in the future.