Opening more than one database at a time?

I am trying to basically copy data from one database to another and am wondering if it is possible to have more than one database open at a time. So for example, I want to do something like this but am wondering if there is a better way: $dbcon = mysql_connect($db_server, $db_user, $db_passwd); //Make source connection mysql_select_db($db_name); //Select source db $source_result = mysql_query("SELECT * FROM users"); //Select all info from users table while ($row_cat = mysql_fetch_array($result)){ //Loop through and insert into new db //Insert into new database } So where I have "Insert into new database" this is where I want to take some of the information from the source and insert into the new database (which uses a different user name and password as well). Any help would be greatly appreciated :) Jeff