$prefix: Your Database table's prefix
# $user_prefix: Your Users' Database table's prefix (To share it)
# $dbtype: Your Database Server type. Supported servers are:
# MySQL, mysql4, postgres, mssql, oracle, msaccess,
# db2 and mssql-odbc
# Be sure to write it exactly as above, case SeNsItIvE!
# $sitekey: Security Key. CHANGE it to whatever you want, as long
# as you want. Just don't use quotes.
# $gfx_chk: Set the graphic security code on every login screen,
# You need to have GD extension installed:
# 0: No check
# 1: Administrators login only
# 2: Users login only
# 3: New users registration only
# 4: Both, users login and new users registration only
# 5: Administrators and users login only
# 6: Administrators and new users registration only
# 7: Everywhere on all login options (Admins and Users)
# NOTE: If you aren't sure set this value to 0

I gave all my host name info and stuff like that but I don't know what to do here. ALso

$dbhost = "localhost";
$dbuname = "root";
$dbpass = "";
$dbname = "nuke";
$prefix = "nuke";
$user_prefix = "nuke";
$dbtype = "MySQL";
$sitekey = "SdFk*fa28367-dm56w69.3a2fDS+e9";
$gfx_chk = 7

do I change any of this, with my host name and pass and stuff or do I leave it like this. Thanks.