I am working now on the same issue that you are working on right now.
I tried to migrate projects created on top of JBoss 4.2.2 to JBoss as7.
During my researchs I did not find any documents talk about migration from 4 to as7, then I tried to deploy the peojects on jboss as7 and
solve every problem I faced.
I faced a problem in running jsf1.2 , then in richfaces 3.3.3.Final , then in hibernate3.2 , and in log4j.
I solved them all except for log4j.
I am still searching to find how to configure it.
try to deploy you project on as7 and solve each error seperately.