I haven&#39;t read all the comments, but it seems like abstracting the core SimpleTest browser may be of interest to you. The code is quite far along and details can be seen <a href="http://drupal.org/node/366978">http://drupal.org/node/366978</a>. My plan was to port the code back to Drupal 6 as a module which seems like it might be useful for you.<br>
<br>Jimmy<br>