Anyway, some explanation of the load balancer. Let's assume the board is shii/* (ie: shii/wakaba.pl, shii/config.pl, etc):

To enable this, do the following:
a) Copy shii/extras/load_balancing/sender.pl into shii/
b) Create shii/redir/
c) in shii/config.pl, set ENABLE_LOAD => 1
Other options: LOAD_LOCAL is a variable that gives a rough estimate how much bandwidth the local boards has per month.
LOAD_HOSTS lists other hosts to send to, their access passwords, and their bandwidth per month. See example below.
d) If you have an old board already set up, you need to convert to the balancer mode. Do this by copy shii/extras/load_balancing/redir-convert.pl into wakaba's root, and run it.
e) Refresh cache from management panel.

Before you do all the above, you'll first want to copy shii/extras/load_balancing/loader.pl to the other hosts that will be helping balance. Make sure they can execute, have permission, and that the PASSWORD in loader.pl has been changed from CHANGEME.

An example:
I have three hosts.

• the main board, which has 100GB per month
• mirror A, which has 30GB per month, a password of "zOMG", and a loader address of www.zomg.com/shii/loader.pl
• mirror B, which has 50GB per month, a password of "mootykins", and a loader adddress of www.4chan.org/shii/loader.pl

LOAD_HOSTS in config.pl is set up as follows: ([host 1, password, bandwidth], [host 2, password, bandwidth], ..., [host n, password, bandwidth]). So, for the above example the line would become:

use constant LOAD_LOCAL => 100;
use constant LOAD_HOSTS => (['http://www.zomg.com/shii/loader.pl', 'zOMG', 30], ['http://www.4chan.org/shii/loader.pl', 'mootykins', 50]);