Msg#: 4566842 posted 12:12 am on May 8, 2013 (gmt 0)
NP hope it works for you and it should apply to any site you can put on it's own subdomain. I'm really not very familiar with magneto, but the only thing I can think of you might have to do, depending on exactly how magneto works wrt linking is perform a string-replace to get the subdomain out of the links/canonical.
So, for code-set2.example.com: echo str_replace('code-set2.example.com','www.example.com',file_get_contents('http://code-set2.example.com'.$_SERVER['REQUEST_URI']));
Would change a link like this: http://code-set2.example.com/some-page.ext
Obviously for code-set1.example.com you just change code-set2.example.com to code-set1.example.com in the replace.