How to deploy JAX-RS Web Services based something other than RESTEasy in EAP 8 / 7 / 6 ?

Issue

• How to deploy JAX-RS Web Services based something other than RESTEasy in EAP 8 / 7 / 6 ?
• Is it possible to deploy JAX-RS based REST webservices using something other than RESTEasy (e.g. CXF, Jersey) in EAP 6?
• How to deactivate RESTEasy and deploy another JAX-RS library. How is that possible?
• When Users try to deploy a JAX-RS REST Web Services based in Jersey they get following error:

DEPLOYMENTS IN ERROR:
  Deployment "vfs:///D:/tools/Jboss/jboss-6.0/server/default/deploy/jersey-test.war" is in error due to the following reason(s): org.jboss.deployers.spi.DeploymentException: JBAS011232:  Only one JAX-RS Application Class allowed. com.sun.jersey.api.core.PackagesResourceConfig com.sun.jersey.api.core.ClasspathResourceConfig com.sun.jersey.api.core.ResourceConfig com.sun.jersey.api.core.ScanningResourceConfig com.sun.jersey.api.core.DefaultResourceConfig com.sun.jersey.server.impl.application.DeferredResourceConfig com.sun.jersey.api.core.WebAppResourceConfig com.sun.jersey.api.core.ClassNamesResourceConfig com.sun.jersey.api.core.ApplicationAdapter

    at org.jboss.deployers.plugins.deployers.DeployersImpl.checkComplete(DeployersImpl.java:1228) [:2.2.2.GA]
    at org.jboss.deployers.plugins.main.MainDeployerImpl.checkComplete(MainDeployerImpl.java:905) [:2.2.2.GA]
    at org.jboss.system.server.profileservice.deployers.MainDeployerPlugin.checkComplete(MainDeployerPlugin.java:87) [:6.1.0.Final]
    at org.jboss.profileservice.deployment.ProfileDeployerPluginRegistry.checkAllComplete(ProfileDeployerPluginRegistry.java:107) [:0.2.2]
    at org.jboss.system.server.profileservice.bootstrap.BasicProfileServiceBootstrap.start(BasicProfileServiceBootstrap.java:135) at org.jboss.system.server.profileservice.bootstrap.BasicProfileServiceBootstrap.start(BasicProfileServiceBootstrap.java:56)  at org.jboss.bootstrap.impl.base.server.AbstractServer.startBootstraps(AbstractServer.java:827) [jboss-bootstrap-impl-base.jar:2.1.0-alpha-6]
    at org.jboss.bootstrap.impl.base.server.AbstractServer$StartServerTask.run(AbstractServer.java:417) [jboss-bootstrap-impl-base.jar:2.1.0-alpha-6]

org.jboss.msc.service.StartException in service jboss.deployment.unit."DialogRapidEz-5.7.ear".POST_MODULE: JBAS018733: Failed to process phase POST_MODULE of deployment "DialogRapidz.ear"
        at org.jboss.as.server.deployment.DeploymentUnitPhaseService.start(DeploymentUnitPhaseService.java:166) [jboss-as-server-7.5.0.Final-redhat-21.jar:7.5.0.Final-redhat-21]
      ......................................
...............................................
Caused by: org.jboss.as.server.deployment.DeploymentUnitProcessingException: JBAS011232: Only one JAX-RS Application Class allowed.  com.sun.jersey.api.core.ScanningResourceConfig com.sun.jersey.api.core.ClassNamesResourceConfig com.sun.jersey.api.core.DefaultResourceConfig com.sun.jersey.api.core.PackagesResourceConfig com.sun.jersey.server.impl.application.DeferredResourceConfig com.sun.jersey.api.core.ApplicationAdapter com.sun.jersey.api.core.ResourceConfig com.sun.jersey.api.core.ClasspathResourceConfig