Hi James,
You can add the page using the following way:
*** open your footer.tpl in plain text editor and find the following code ***
Code:
<li><a href="account.php">{$lang.edit_account}</a></li>
*** add the following code ***
Code:
<li><a href="tools.php">Tools</a></li>
*** save changes ***
You should also create a page by your way. But you will have to edit tools.php and point edit-account.php to a newly created tpl file