How to install the GlassFish 3 server adapter with Eclipse Helios 3.6

Question

Question as stated in the title: how to install the GlassFish Server Adapter on Eclipse Helios 3.6?

Answer 1

On the new Eclipse (JUNO):

Help --> Install New Software...

Then, insert http://download.java.net/glassfish/eclipse/juno inside the URL field, and press ENTER.