Showing attachments and child pages in a list

Hi there,

Just hoping someone can help. I want to be able to display child pages and attachments, and attachments of child pages on a page.

So that it looks something like..

-Child Page 1
— Attachment 1
— Attachment 2
-Child Page 2
–Grandchild page 1
—Attachment 3

Does this make sense?

At current I’m using this:

global $id;
  wp_list_pages("title_li=&child_of=$id&show_date=modified
  &date_format=$date_format");

which shows all child and grandchild pages. Is there something I can just add to this that will add attachments in too>

Thanks for any help.