WRF distributions must be located under $WRF4G_LOCATION/repository/apps directory. In order to use them, you have to define WRF_VERSION variable in resources.wrf4g file. The WRF package must have this form WRFbin-[WRF_VERSION].tar.gz.
WRFbin-local_WRF.tar.gz package is a special package because it does not contain any binary. It is only used if you want to execute your local WRF model installed in your resources. In this case, it is not necessary to move the WRF binaries in each simulation as happened in other packages.
Note that, if you use this package, you must also configure prolog.wrf4g file. Otherwise, WRF4G framework probably won't find WRF binaries on the computing resource.