well i've gone to another website and i found that some european players and some american players found if they changed the 4 characters at the end to "eu40", "eu20", or "**30", with ** being the origninal characters. I got the games with StarWars The Best of PC compilation, and my keys end with pa40, im assuming because im in australia, and PA stands for pacific or pacific asia. I have sent a lengthy story to lucasarts and hopefully they can sort me out.
here is the forum with the american/european solutions:
http://forums.lucasarts.com/thread.jspa?messageID=2995377)