Once installed you are left with the decision to test the install, which would put you down the road of expanding the ear and war per the instructions. However, the 901 updater executable requires you to apply it to an archived war file. So, you might want to apply the updater before expanding the ear and war and moving the resulting ear directory into JBoss's deploy directory.
We did not know the CF 9.01 updater required an archive, and we had already deleted the war file, so we had to recreate the war, apply the updater, re-exand and swap out the new war with the old war directory. So, just keep that in mind if your doing a complete install as we were doing.
Here are the complete docs for installing the CF 9.01 Updater:<br />