The procedure for using Simple JSF FlowScope in your application is quit easy. Add the jar to your project (add it in the WEB-INF\lib folder or as dependency in your Maven POM). Initialise the Custom Scope and all required beans by importing the SFS Spring xml.
<import resource="classpath*:/META-INF/spring-sfs-init.xml" />Define your beans in the Spring application context with a scope value of SFS and your done.
You don't need to define the Elresolver or VariableResolver and the Additional PhaseListener since this is already done in the faces-config.xml file within the jar.
you can also look at the examples how things should be configred and behave.