I will feel happy if You would add new feature.
In the feature, we would add the xmltoolkit library into PHP project as same as Zend Framework and PHP Unit,
with using [ include path | configure include path... | add library ] , right-clicked on php project
Nice to Have,
because now we can add the xmltoolkit library with [add external source folder] button instead of the [add library] button.
But now we also need to extract the library on local folder manually.