You can find the migration guide listed here for EAP https://access.redhat.com/documentation/en-US/JBoss_Enterprise_Application_Platform/ (select the appropriate EAP version on the left side of the page).
Thanks for the reply Jaikiran! That guide will indeed be very helpful.
I have a noob question though. I deployed JBoss 5.1.0 GA by following some steps which almost resemble the steps mentioned here: http://cmanios.wordpress.com/2012/05/08/install-jboss-5-1-0-ga-to-windows-7/ (Can't find the original JBoss guide I followed ATM) The guide that you referred talks more about migrating from JBoss 5 EAP to JBoss 6 EAP, not from JBoss 5.1.0 GA to JBoss 6 EAP. While deploying JBoss 5.1.0 GA, I had to download a ZIP, extract it, set correct environment variables and run the command from the bin directory. But for JBoss 6 EAP, I have got an installer to run. So, I am a bit confused - is the migration from 5 EAP to 6 EAP different from migrating from 5.1.0 GA to 6 EAP?
Please pardon my noob questions, I am new to JBoss AS. These different version names are confusing me at the moment. I appreciate your time and patience.