hi guys i'm playing about with a website and i want people to be able to upload images witch are displayed as thumb till clicked

i'm using a simple login system with this
PHP Code:
$member = mysql_fetch_assoc($result);
            $_SESSION['SESS_MEMBER_ID'] = $member['id'];
            $_SESSION['SESS_USER_NAME'] = $member['username'];
            $_SESSION['SESS_FIRST_NAME'] = $member['firstname'];
            $_SESSION['SESS_LAST_NAME'] = $member['lastname']; 
so when a photo is uploaded it should go in a album call "USERNAME".
I have a mysql db setup already for the login so photo viewer could use that if needed

thanks