HELP : Styling BLOGROLL and PAGES titles PHP in WHITECLEAR theme

Hello all . this is a plea for help to all the WORDPRESS pros here in this forum.

I’m installing my first WORDPRESS site and have chosen to use the

JILL WHITECLEAR THEME . http://themes.wordpress.net/columns/1-column/483/jill-whiteclear-10/

.

I’ve been able to modify much of the install . but TWO DETAILS REMAIN .

.

on the sidebar there are two list elements. PAGES and BLOGROLL.
which seem to be controlled by an outside PHP page that is not
available in the THEME-EDITOR.

ALL I WOULD LIKE TO DO IS REPLACE THE TEXT TITLE WITH AN IMAGE

———–

I’ve been able to modify the other links in the SIDEBAR by accessing the
SIDEBAR page in the theme-editor.

this is the CODE which is found regarding these entries in the SIDEBAR page :

<?php wp_list_pages(); ?>

<?php get_links_list(); ?>

________________________________

here is the CODE from the INDEX.PHP generated by WORDPRESS when published :

<li class="pagenav">Pages
<ul><li class="page_item"><a href="http://blog.momomagazine.com/?page_id=2" title="Momo is...">Momo is...</a>
</ul>
<li id="linkcat-2"><h2>Momo Hearts</h2>

<ul>
<li><a href="http://www.nontype.com&quot; title="Aerosyn-Lex">nonTYPE</a></li>
</ul>
______________________________________________

You can see in the CODE TAKEN FROM VIEW SOURCE what is controlling the title of those two list elements. I can’t however figure out where to change
the TITLE to an IMAGE in any of the THEME TEMPLATES .

PLEASE PLEASE help me find the proper way to modify these titles .

THANKS IN ADVANCE