This is a very simple project for someone who knows .htaccess, mod_rewrite, and apache extensively.

I have a PHP file when queried is of the sort:

I need it re-written to be

IF NOT possible to use their domain as the subdomain, acceptable alternatives are:

http://cnn-com/ (subbing "." for "-")
http://cnncom/ (removing ".")

I've tried many possibilities to achieve this but these is a detail wrong in every attempt, otherwise I would post what I have tried.

Please help!