register a widget in Widgetmanagement via sql installscript

mysql4-upgrade-0.0.31-0.0.32.php

<?php
$widgetParameters = array(
    'width_attrib' => '250',
    'height_attrib' => '200',
    'group_key' => '1'

);

$instance = Mage::getModel('widget/widget_instance')->setData(array(
    'type' => 'workflow/task_widget_news',
    'package_theme' => 'base/default',
    'title' => 'newswidget on the dashboard',
    'store_ids' => '0',
    'widget_parameters' => serialize($widgetParameters),
    'page_groups' => array(array(
        'page_group' => 'pages',
        'anchor_categories' => array(
            'page_id' => 5,
            'group' => 'all_pages',
            'layout_handle' => 'default,catalog_category_layered',
            'for' => 'all',
            'is_anchor_only'=>1
        ),
        'notanchor_categories' => array(
            'page_id' => 5,
            'group' => 'all_pages',
            'layout_handle' => 'default,catalog_category_layered',
            'for' => 'all',
            'is_anchor_only'=>0
        ),
        'all_pages' => array(
            'page_id' =>'5',
            'layout_handle' => 'default',
            'for' =>'all',
            'block' =>'right'
        ),
        'pages' => array(
            'page_id' =>'5',
            'layout_handle' => 'cms_index_index',
            'for' =>'all',
            'block' =>'right'
        ),

    ))
))->save();