anchor.diff:  
   cat <<_EOF > $KB_PROPS
   #
  -# EDIT FOLLOWING KB PROPERTIES BELOW AS NEEDED
  +# EDIT THE FOLLOWING KB PROPERTIES AS NEEDED:
   #
   org.killbill.dontexist=foo
   _EOF
   
   su -l -c "cd /var/lib/tomcat/bin && /var/lib/tomcat/bin/updateProperties.sh $DB_PROPS $KB_PROPS" tomcat
   ```
  -
  -Specifying such user data script in the AWS UI is shown below:
  +First, you need to edit the database properties. DB_SERVER should be set to the full name of the DB instance, as given in the `Connectivity and Security` panel (see above). DB_USER and DB_PASSWORD should be set to the administrator credentials you have chosen for the RDS instance.
  +
  +Second, you may optionally edit any Kill Bill properties that you need to change from the standard defaults.
  +
  +[3] Launch the EC2 instances
  +
  +The next step is to launch the number of EC2 instances you want, all based on the Kill Bill single AMI. To do this, follow the same steps given above for single-tier deployment, until you come to the page titled **Choose Instance Type**. At this point, instead of selecting `Review and Launch`, click on the option `Configure Instance Details`.
  +
  +This page will provide you with a long list of options. The first option is `Number of Instances`. Set the number of instances you wish to launch. Each instance will have essentially the same configuration, including the same image and the same security group.
  +
  +After setting the number of instances, scroll down to the bottom of the page. The last section is titled **Advanced Settings**. In this section you should set the configuration file you produced above. The setting panel should look like this:
   
   image:https://github.com/killbill/killbill-docs/raw/v3/userguide/assets/aws/userdata.png[align=center]
   
   
   Make sure that the security group for the EC2 instance also includes the security group for the RDS instance to ensure your EC2 instances can connect to RDS.
   
  -[3] Install database schema
  -
  -In order to install the database schema, you will need to `ssh` to one EC2 instance using your private key -- make sure you have alowed incoming SSH traffic on port `22` in your security group.
  +[4] Install database schemas
  +
  +To install the database schemas, you will need to `ssh` to one EC2 instance using your private key -- make sure you have alowed incoming SSH traffic on port `22` in your security group.
   
   ```
   # SSH as ubuntu user
  
positive.code: > sudo service killbill start
  ```
  
  [5] Add the ELB in front of the EC2 instances
  
  
  == Configuration
  
negative.code: * kaui schema: `https://github.com/killbill/killbill-admin-ui/blob/master/db/ddl.sql`
  
  
  The procedure to install the schemas is:
  
  ```
  # install killbill schema -- assumes it was saved as killbill.ddl
  