where is Eric , btw ?
Eric is very busy to provide at obarun user(not only) a new tools to help people about service handling. By the way you have here some people using Obarun from a while and answer you very well...
Anyway, instead of installing JWM by obarun-install script you can choose plasma as template picking the number 3 at the main menu. If something go wrong, please a bug report at the good section on the forum.