Also, I should add. The satellites.xml lists the satellites and transponders, it does not contain the services (channels). If you want to combine Rat's bouquets with existing channels, you will have to do the following:
Receive the existing channels from receiver and then combine them with the newer ones by Rat (you will have to download them, so plugin is not for you). Then transfer back to receiver.
Receive the existing channels from receiver and then combine them with the newer ones by Rat (you will have to download them, so plugin is not for you). Then transfer back to receiver.