Hello everyone first thank's for help with previous problem finally OTRS send emials and thick then

. I got question how to install and where I can find "Customer web interface". My friend tell my that is probably Frontend Modules located under "$OTRS_HOME/Kernel/Modules/*.pm". I serach in documentation and i didn't understand where exeacly is and how to install. Maybe this customer web interface is together with ITSM module instalation ?.
Thank's for any help.
Regards.