11
In your template /profile/templates/profile_userinfo.html change
<{foreach item=field from=$category.fields}>
<tr>
<td class="head"><{$field.title}>td>
<td class="even"><{$field.value}>td>
tr>
<{/foreach}>
to something like
<{foreach item=field from=$category.fields}>
<tr>
<{if $field.title == 'Email'}>
<td class="head"><{$field.title}>td>
<td class="even">
<a href="mailto:<{$field.value}>">
<img src="/modules/news/images/friend.gif" alt="mail" title="mail" />
a>
td>
<{else}>
<td class="head"><{$field.title}>td>
<td class="even"><{$field.value}>td>
<{/if}>
tr>
<{/foreach}>
