Yes.
Changing the image will erase all your settings and change the satellite.xml file. You may copy the lamedb file and the settings file from etc/enigma2. These two files contain all your antenna settings and channels. You would also need to copy the satellites.xml file from etc/tuxbox. All of your satellite settings and channels will not work correctly unless the satellites.xml that they were created with is installed in the image.
You can scan all the satellites and channels, then you can transfer them to almost any enigma2 image in 5-10 minutes providing you keep the lamedb file, settings file, and the satellites.xml file that you originally used.