fw.install D:/<Bosch IoT Gateway Software_server>/bundles/com.prosyst.mbs.osgi.preferences.jar
you may type:
fw.install com.prosyst.mbs.osgi.preferences.jar
You may set mbs.bundles.base to the directory hosting most of the bundles that you are to use and then only type bundles' JAR names.
install com.prosyst.mbs.osgi.scr.jar -s com.prosyst.mbs.osgi.connector.socket.jar
will install com.prosyst.mbs.osgi.scr.jar and will install and start com.prosyst.mbs.osgi.connector.socket.jar