i tried this link: http://downloads.myeclipseide.com/downloads/products/eworkbench/discovery-6.0/ but i'm fail how is this?
As mentioned in downloads.myeclipseide.com,
Direct access to the MyEclipse download area is not permitted. Please go through the MyEclipse portal's download area to download MyEclipse Enterprise Workbench.
So you can load a full myeclipse distro, but not one plugin into a vanilla eclipse.
Aside from that, the revived Eclipse VE (Visual Editor) (archived since June 2011, now archive as a sourceforge project) might be a good alternative
You can install it with Eclipse 3.5