Adding a currency

There are two hooks you can use to add and manipulate currencies:

1. jigoshop_currencies

2. jigoshop_currency_symbol

To add a currency to the options dropdown in the backend, add something like this to:
wp-contents/themes/YourTheme/functions.php:

function jigoshop_add_my_currency( $currencies ) {
     $currencies['SIM'] = 'Simoleans (§)';
     asort($currencies);
     return $currencies;
}
add_filter('jigoshop_currencies', 'jigoshop_add_my_currency', 1, 1);

And to set the symbol up:

function jigoshop_add_my_currency_symbol( $currency_symbol, $currency ) {
    if ($currency=='SIM') $currency_symbol = '§';
    return $currency_symbol;
}
add_filter('jigoshop_currency_symbol', 'jigoshop_add_my_currency_symbol', 1, 2);