ERROR: cURLis not installed. - on Installation Wizard

I downloaded PS200 to see if I would still have the same problem with the cURL as PS300. When I downloaded the site exactly as I had done with PS300, using localhost testing server, I get these error msgs when I tried to see index.php in a browser:
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Warning: mysql_pconnect() [function.mysql-pconnect]: php_network_getaddresses: getaddrinfo failed: No such host is known. in C:\wamp\www\PowerStore200\Connections\localhost.php on line 9

Warning: mysql_pconnect() [function.mysql-pconnect]: [2002] php_network_getaddresses: getaddrinfo failed: No such host is kn (trying to connect via tcp://Please type your database hostname:3306) in C:\wamp\www\PowerStore200\Connections\localhost.php on line 9

Warning: mysql_pconnect() [function.mysql-pconnect]: php_network_getaddresses: getaddrinfo failed: No such host is known. in C:\wamp\www\PowerStore200\Connections\localhost.php on line 9

Fatal error: php_network_getaddresses: getaddrinfo failed: No such host is known. in C:\wamp\www\PowerStore200\Connections\localhost.php on line 9
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This is the code in localhost.php in the Connections file: (lie 9 is the second to last one)

<?php
# FileName="Connection_php_mysql.htm"
# Type="MYSQL"
# HTTP="true"
$hostname_localhost = "Please type your database hostname";
$database_localhost = "please type your database name";
$username_localhost = "please type your username";
$password_localhost = "please type your password";
$localhost = mysql_pconnect($hostname_localhost, $username_localhost, $password_localhost) or trigger_error(mysql_error(),E_USER_ERROR);
?>

I don't know how to resolve this. However, I only want to resolve this if I can't get PS300 to work. BTW- the PS200 site exactly as downloaded with the PowerStore200 as the site name (as I am using this as a test site, as first)

Also - when you click the link to the PS2 start up guide, you get PS3.

Please advise how this can be resolved.