Additional wordpress theme options page.

<?php

add_action( 'admin_init', 'DWM_theme_options_init' );
add_action( 'admin_menu', 'DWM_theme_options_add_page' );

function DWM_theme_options_init(){
    register_setting( 'DWM_theme_options', 'DWM_theme_options');
}

function DWM_theme_options_add_page() {
    add_theme_page( __( 'DWM Theme Options', 'dwmtheme' ), __( 'DWM Theme Options', 'dwmtheme' ), 'edit_theme_options', 'theme_options', 'DWM_theme_options_do_page' );
}

function DWM_theme_options_do_page() {
    global $select_options;
    if ( ! isset( $_REQUEST['settings-updated'] ) ) $_REQUEST['settings-updated'] = false;


    // OPTION PAGE HEADER
    ?>
    <div>
<?php screen_icon(); echo "<h2>". __( 'Custom Theme Options', 'dwmtheme' ) . "</h2>"; ?>
<?php if ( false !== $_REQUEST['settings-updated'] ) : ?>
<div>
<p><strong><?php _e( 'Options saved', 'dwmtheme' ); ?></strong></p></div>
<?php endif;
 // END OPTION PAGE HEADER
?>

    <form method="post" action="options.php">
<?php

    settings_fields( 'DWM_theme_options' );
    $options = get_option( 'DWM_theme_options' );

    ?>
    <tr valign="top"><th scope="row">
<?php _e( 'Additional Header info', 'dwmtheme' ); ?></th>
<td>
<input id="DWM_theme_options[additionalheaderinfo]" name="DWM_theme_options[additionalheaderinfo]" type="checkbox" value="1"
<?php checked( '1', $options['additionalheaderinfo'] ); ?>
</td>
</tr>
<p>
<input type="submit" value="<?php _e( 'Save Options', 'dwmtheme' ); ?>" />
</p>
</form>
</div>
    <?php
}