How can I add a new block reference for widget instance in Magento?

magento, widget

Solution

Ok. Found the answer. Go to `page.xml`, add this

<block type="core/text_list" name="custom_script" as="custom_script" translate="label">
    <label>IMPORTANT TO HAVE THIS TAG</label>
</block>

The important tag is `<label>`. Without this you won't see the area in selection box. Thank Anthony Nguyen for this.

Problem

When adding a new widget instance in magento (Admin > CMS > Widget Instance) you need to select layout update for it. In the block reference option, there are several default areas like page top, page bottom, left, right.... How can I add my custom new area to this selection box?

Original source