redboy504

i just got an n3 headunit from my friend cause my N1 burned out i plugged it up and it worked fine but i tried to put my N1 nav disc in and it wouldnt work so i read another forum and it gave me instructions on how to flash the navigation software but it didnt work i tried it and it wont even update it just keeps failing and now my radio doesnt even play cds. i can only listen to fm radio.. if i get the n3 disc can i fix this problem?? or is there another way i can fix this????