i just found that SimpleTreeDropdownField doesn't have a 'setTreeBaseID' method (as the 'regular' TreeDropdownField has - see http://api.silverstripe.org/forms/fields-relational/TreeDropdownField.html#$treeBaseID).

i had a glance at the code and found a quick way to add this functionality:

- just add one more param ($baseID) to the constructor:

function __construct($name, $title = "", $sourceClass = "SiteTree", $value = "", $form = null, $emptyString = null, $baseID = 0)

- then, use it in the 'getHierarchy' call:

parent::__construct($name, $title, $this->getHierarchy($baseID), $value, $form, $emptyString);

that's it - maybe you want to add this in svn, unclecheese?

Awesome.. thanks. Lots of new stuff will be coming in soon, so I'll roll this in, too.

just needed this again in a current project and couldn't find it in the source (r402), maybe you just forgot?

back again: it's in now
don't know as of which revision, but thanks anyway!