change db connection

Hi everyone
after installing and configuring my site in localhost (with easy php) every works great. Now i want to publish it on the web. I've just open a free account in awardspace.com (php hosting and mysql). They give me a database name that i can't change, same thing for username and password. Where can i change the settings for the connection to the database (put the right url, name, account for the db)? Settings.php? database.mysql.inc (inside includes)?
thanks Luca