Changing my root web adress in config?

i have my site here www.tshirtsuperstar.com

i have the files etc in the folder and have my domain name reading that. however, when you visit the site, all the links change to i-newmedia.com/tshirtsuperstar.... i-newmedia.com is the root domain name.

But if you actually type in tshirt superstar as the domain for any of the pages, it still works e.g.

http://www.i-newmedia.com/tshirtsuperst ... duct_id=90

is the same as

http://www.tshirtsuperstar.com/index.ph ... duct_id=90

I jkust want to get it so that it only displays tshirtsuperstar.com on the links, the URL bar etc and not i-newmedia.com at all

I have tried messing around with the config.php file but cant get it to work.

However i did change the config.php in admin/config and it works fine - it was simply a case of changing the root http:// address (however the main config.php is not that simple)

Please help ASAP, thanks!!

Go into your admin panel, then go to SYSTEM > SETTINGS and under the Store tab change the Store URL

i cant beleive itb was that simple - and i was going in modifying code, uploading, testing etc.

cheers alot!