If that would be the case, the whole purpose of the plugin has gone. It's supposed to update all the needed items itself. Only the very first time you run it, a scan might be needed to make sure the transponder providing the Bouquet Association Table is available.
And LraiZer himself stated that using a cronjob to run the plugin should work; if a scan would be needed first this wouldn't be possible.
Just my 2 cents........
So it finds new channel on new transponder, updates satellite.xml and lamedb? If so it is really smart.