This certainly sees my UK and USA maps on a GO530. What I did was install the Navcore and the maps (cracked with Alberts Easy Activator) on an SD card, I did not wipe the internal memory. When booted the 530 sees the SD card Navcore. The only problem I had was Simons voice did not work and I had to copy files across (Katie was OK, but don't want to be told what to do by a woman). This was an easy copy from internal memory to SD card.