Require Eclipse 3.1.0 build I20050627 or geater
Begin the installation from the Eclipse Help menu item. Select Software Updates | Find and Install...
You will need to change the radio button to indicate that this is a new install.
You have to click on the New Remote Site button. If you are behind a proxy then take care about Eclipse proxy configuration.
Type in correct information to install plug-in.
When you first come back to this screen, the site you added will NOT be selected. Be sure to select it before clicking Next.
This next screen shows all of the features that are available to install.
Click the button to accept the license agreement.
Confirm the install location
Eclipse needs to be restarted after installing the plug-in.
Use of plug-in
Select m3g file and bring pop up menu, choice Open With | M3g Viewer
Update site location is http://m3g-viewer.sourceforge.net/update