Addon Domain without redirect

[abythebay]

I am not sure if this is possible, but here is what I want to do. I wish to create an addon domain (domain_b.com) that defaults to the directory of the primary domain (domain_a.com). The trick is that I don't want to use a redirect, but want domain_b.com to read in the url, but use all of the same files as the primary domain, without having to create a clones of all of these files in a subdirectory on the ftp server. Is there a way to make the addon domain direct to the root directory and keep it's domain address in the url display?

[GvilleRick]

Just park the 2nd domain on the main domain rather than create an add-on domain.