Filter support

HI there,

No problem.

AFTER PAYMENT SELECTION ROW

add_action('give_payment_mode_after_gateways_wrap', 'custom_after_payment_selection');

function custom_after_payment_selection() {
	echo '<p>This is custom text AFTER the payment selection row</p>';
}

OFFLINE DONATIONS LABEL

add_filter('give_payment_gateways', 'custom_offline_label');

function custom_offline_label($gateways) {
	$gateways['offline'] = array(
		'admin_label'    => 'Offline Donation',
		'checkout_label' => __( 'Mail a Check', 'give' )
	);

    return $gateways;
}

DONATION TOTAL
Because the total is needed for processing and is stored and reused in many different areas it’s not suggested to remove it. Instead, I would just hide that via CSS, like so:

p#give-final-total-wrap {
    display:none;
}

I’ll update our documentation with these samples. Thanks for your questions, keep us posted on how it goes!

The amount field will be empty if you choose “Set Donation” and enable the “Custom Amount” option. But for multi-level donations, we don’t have an out of the box way to make the Custom Amount the default. You’d have to do that with Javascript, like something like this example:

http://stackoverflow.com/questions/9476617/how-to-set-radio-button-status-with-javascript

Thanks!