Hi Nemésio,
>The intention was to produce forms, such as simple forms for applying for credit, with a label's, checkbox, etc etc, very simple forms.
You can generate these forms using Freemarker (http://freemarker.sourceforge.net/) templates.There is an Eclipse plug-in for Freemarker that you might be able to use.
You might find the basic documentation to use the templates with human tasks here:
https://hudson.jboss.org/hudson/job/jBPM5/lastSuccessfulBuild/artifact/target/jbpm-5.0-SNAPSHOT-docs-build/jbpm-docs/html/ch08.html