I also added a way to do this declarative, via xml, but I really doubt this one is in AS5.1,
meaning you're definitely have to do it via adding a custom deployer.
Yup, this one is not in 2.0.x, only in 2.2.x, which is not fully compatible with AS5.x, only with AS6.
* http://anonsvn.jboss.org/repos/jbossas/projects/jboss-deployers/trunk/deployers-impl/src/main/java/org/jboss/deployers/plugins/classloading/AbstractTranslatorsDeployer.java