NEWS YOU CAN USE:

If you have not yet installed the Assembly Tools for Inventor 11, follow these steps:

1. Close Inventor, if necessary.
2. Browse to the \SDK\Tools\Users\AssemblyTools folder that is located in your Inventor installation path.
3. Double-click the Setup.exe file.
4. Follow the instructions to complete the installation.

There will now be an Assembly Tools toolbar in the Assembly environment.

For an example of why you would want them loaded, check out:

Grounding Component to Origin of Assembly