Just thinking about how the G6 hardware works --- can you use the device to create roms from DS carts you already have? doesn't seem like there's a way...where woudl you plug them in?
You can't create roms from carts you already have but once you have the rom on your g6L you can upload the saves from your cart to the rom on the G6L. Does that make sense? You would need another device to create a rom image from your cart.