i had to give a friend CD key and the changer didn't work
Original SC not pirate copy...

Changer asks me to put in digits and my CD-key has both numbers and letters

nope, there are 2 kinds of sc keys, the old ones have 16digits (only numbers), the new ones have 26digits (numbers and letters). This keychanger obviously works with old keys...

chingen su madre todos los putos puruanos que estan bien feos los hijos de su puta madre