Can I edit the WP "page" widget?

[lindastacy]

Edited to clarify - It seems that what I really want is more often referred to as an "accordion" menu (not a dropdown menu).

I want to edit the standard WordPress "page" widget to have sub-pages be a drop down menu from the parent page in a sidebar. But I can't even find the widget code in the WP files (and they aren't in my theme files either). Using v2.8... whatever the current version is.

Any ideas on how to do this?

Thanks in advance.