how install only rs in silence mode

Hello,
   I have installed the version 6.0.1 in silence mode without the JRS application:
- I have commented the following line in silent-install-server.xml
<offering profile="TMP" id='com.ibm.team.install.jfs.app.jrs'/>
- I have executed the following command:
./userinstc -dataLocation /tmp/silent-install/data -silent -showVerboseProgress -nosplash -input silent-install-server.xml -acceptLicense

Now I want to install the jrs application. I have tried to install with Installation Manager in GUI mode but it doesn't detect my installation. So I can install jrs inside my current installation.
How can i do ?
- re-execute the command line only with the package JRS ?
- Create an answer file with IM in reord mode and install with this answer file ?

Other question:
- Is it possible to install the JRS package without LQE in command line ?

Thank you very much for your return

Best regards

David