At the moment you can use the Workspace Wizard Webpart only on the root site.
To add the Webpart to the root site, you have to activate it first.
Choose Site Actions and than Site Settings.
Select the hyperlink "Site collection features"
Activate the Webpart.
Navigate back to your root site and click on "Edit Page" in the Site Actions menu.
Click on the "Add Web Part" button.
Select "Collaboration Manager" in the "Categories" list and than choose the "Workspace Wizard WebPart". After that, please push the button "Add".
The WebPart is now placed. To edit it please select the small arrow and click on "Edit Web Part".
The edit form of the WebPart is now displayed.