You use the cas interface connected via usb & rs232 and the dummy card that came with it to program the T-Rex if thats what you mean. Yes you could also use a dragon loader card and load Predator/Predasarus firmware onto the Dragon loader Card and then install the firmware onto your cam whilst it is inserted into your receiver but why would you want to take 20+ minutes to do something you could do in 10 minutes with the dummy loader card that comes with the cas interface when you buy it.......