Using the Mailchimp WP plugin in DEV mode with basic fields

basic-mailchimp-fields.php

<?php

function pwcc_mailchimp_fields( $fields ) {
	
	
	unset ( $fields );
	
	$fields = array (
		0 => array (
	        	"name" => "Email Address",
	        	"req" => 1,
	        	"field_type" => "email",
	        	"public" => 1,
	        	"show" => 1,
	        	"order" => 1,
		        "default" => '',
		        "helptext" => '',
		        "size" => 25,
		        "tag" => "EMAIL",
		        "id" => 0
		),
		1 => array (
		        "name" => "First Name",
		        "req" => 1,
		        "field_type" => "text",
		        "public" => 1,
		        "show" => 1,
		        "order" => 2,
		        "default" => "",
		        "helptext" => "",
		        "size" => 25,
		        "tag" => "FNAME",
		        "id" => 1
		),
		2 => array (
		        "name" => "Last Name",
		        "req" => 1,
		        "field_type" => "text",
		        "public" => 1,
		        "show" => 1,
		        "order" => 3,
		        "default" => "",
		        "helptext" => "",
		        "size" => 25,
		        "tag" => "LNAME",
		        "id" => 2
		)
	);

	return $fields;
}
add_filter ( 'mailchimp_dev_mode_fields', 'pwcc_mailchimp_fields');

function pwcc_mailchimp_groups( $groups ) {
	$groups = array();
	return $groups;
}
add_filter ( 'mailchimp_dev_mode_groups', 'pwcc_mailchimp_groups');

wp-config.php

<?php

define('MAILCHIMP_DEV_MODE', true);