additional attribtues to page links: how?

Hi!

I would like to be able to control the title attributes, as well as the link text of the link menu generated via the wp_list_pages() function.

Is there a plugin that allows to do that? I considered using the page’s additional fields but if i read the doc correctly, it’s not possible to retrieve the data and output the html markup i would like to have, which is:

<li><a href="link1.html" title="This is a very long description of what's beyond that click">
                        This is the page title<br />
                    <span class="link-description">this is a short description of what's beyond that click</span></a>
                </li>

Anybody who has an idea on how to get my list of page links rendered like this html markup will be blessed with eternal love,nothing less.