Inducing JBoss to choose your jsf version

This is my real first post. And i choose this problem because i've a note in a recycled sheet that i want to discard.
So, the problem:
"I want to use jsf version 1.1 in a JBoss environment that, for default, wants jsf 1.2 pages"
I solved it chancing the web.xml file in the JBOSS root -> server -> default -> deploy -> jboss-web.deployer -> conf in two ways:

1) I comment out the second and third "Common Listener Configuration" listener:
JBossJSFConfigureListener and WebappLifecycleListener
2) I comment out the init-param tagLibJar0 and tagLibJar1

Obviously in this way you've to provide the jsf libraries your self!!!