You have to have talk groups assigned to trunk systems, and then assign the talk groups to scan lists. You then enable the scan lists you want, save the file, upload it to the scanner and fire away. You MUST have the scanner turned on before, during and after the procedure. Once your file is loaded it will reboot and start scanning. Once it's scanning remove the programming cable.
You can program any object to any and all scan lists if you wish. You can mix and match, it doesn't matter.