You can edit these pages by creating a login account. (Don't bother if you are not a Keitt Lab member as accounts require confirmation.) Once you have an account, click on the "login" menu item and then "create content" in the side bar.
Also, you can link to your old web pages which are now found at http://www.keittlab.org/~username/ This will redirect to your public_html folder. Put your web pages in there (or you can add them to drupal directly). Make sure your public_html folder is world readable!