Here's how to "link" the JBoss Tools plugins to your Eclipse installation.
In order to use JBoss Tools, you need to have the Java EE or Java & Reporting version of Eclipse (which includes the Java Development Toolkit (JDT), the Web Tools Platform (WTP), the Data Tools Platform (DTP), among other plugins. Supported versions include Sun, IBM, BEA, and Open JDK. If you're unsure if you have all required plugins, you might want to look at the build page for the release you're downloading. NOTE: If you use Eclipse Web Tools (WTP) 2.x then that version has issues with ejb deployments.
We have a patch to fix some of this described in the JBoss Tools 2 release blog entry The easiest way to get JBoss Tools installed is to point the Eclipse Update Manager at the JBoss Tools Update Site.!
Unlike with the Update Manager, Eclipse doesn't know when you install a new set of plugins manually (regardless of whether you extracted them directly into your Eclipse plugin or used the links/dropins feature).
Therefore, when you start Eclipse the next time, you need to instruct it to clean out its plugin cache so that it discovers the new plugins (and flushes plugins which have been removed).
When new releases of JBoss Tools are available, you can upgrade to them using the same process.
You can configure Automatic Updates in Window Preferences if you want to be notified of new updates or have Eclipse automatically install the updates.Eclipse effectively performs a runtime merge of the available features and plugins in these directories.NOTE: The links feature just described became the dropins feature in Eclipse 3.4.If you prefer not to pollute your Eclipse installation with third party plugins, a better management option is to externalize these addons.Eclipse has long supported a feature known as "links" which allows you to associate any directory that follows the standard Eclipse structure, and which contains additional features and plugins, with your Eclipse installation.Instead of using the Update Manager, you can download the archive of the JBoss Tools plugins and incorporate them into your Eclipse installation manually.