How to add a custom action to the document library

[alarocca]

Hello, I would like to add a custom action to the Share Document Library in order to open a custom form.

I found http://wiki.alfresco.com/wiki/Custom_Document_Library_Action but unfortunately it does not work on v3.4

Does anyone know how to achieve it on Alfresco v3.4.c?

Best regards

[alarocca]

I was able to add my custom action. Now I need to show a "page"? How can I do that?

What I need is a really simple page where I place an applet and a close button.

Best regards,
Alessandro