You could customize the individual Payment Module by checking for how much is in the Order ... example, for PayPal Standard you could use:
Code:
$this->enabled = ((MODULE_PAYMENT_PAYPAL_STATUS == 'True') ? true : false);
// bof: disable payment module when order is less than 2.00
global $order;
if ($order->info['subtotal'] < 2.00) {
// echo 'Do not show PayPal! ' . $order->info['subtotal'];
$this->enabled = false;
} else {
//echo 'Do show PayPal! ' . $order->info['subtotal'];
}
// eof: disable payment module when order is less than 2.00