Which version of Eclipse. You should have Eclipse IDE for Java EE Developers. In Eclipse, go to  Help | Install New Software. Then in the  Available Software dialog box click Add. In the Add Site dialog box, add the link from

http://www.jboss.org/tools/download.html

(I recommend the JBoss  Tools 3.1 :: Eclipse 3.5.0 under Development Updates)

in the location text box (you can leave the Name box empty). Then click OK, and back on the Avaialable Software dialog box select the tools you want installed and click Next and follow the rest of the steps.

Would some kind moderator move this post to the JBoss Tools forum?

Juan, please use the correct forum. Any forum with the word "Development" is only for people working on that project.