Twice, how are you loading songs on your zip cartridge? If you are copying from your computer directly to the Zip ..they will not show in the G1000..You either copy directly from the G1000 built in zip to the external zip via copy function[takes time], or from floppies via the same copy function..

The best and quickest way is to download the Roland Data Base Manager software..then you can use your computer to load a zip that will read in the G1000..

Remember if you edit a zip using the computer..that is to save or delete a file it will void the possibility that the zip will read on the G1000...When you add a file , save the file from your computer to a floppy, then copy the floppy to the G1000..this will assure no problems..