never mind, I figured it out.
I have not yet transferred the domain name I will be using, because the site is currently still in use.
I used one click installation to install Joomla.
Now, when trying to set up the mysql database at http://www.<temp_site>.dreamhosters.com/installation/index.php#, I get the message “Error: Could not connect to the database. Connector returned number: Could not connect to MySQL server.”
Am I getting this message because I’m trying to set up Joomla using dreamhost’s temporarily-assigned site?