Install Subclipse
Subclipse - http://subclipse.tigris.org/
Startup eclipse
Select Help -> Software Updates
Select Available Software, click Next
Click Add Site
Enter http://subclipse.tigris.org/update_1.6.x for the URL
Click Finish
Check the Subclipse box and click Next
Ignore the integrations unless you have a need for them, they can stop the install from working
Accept terms, click Next, click Finish, click Install All
Restart the workbench when asked