Actually, I registered here because I'm looking to install cameras at my house, and have no prior experience. While browsing posts for info, I came across this thread, and figured I'd offer what I though was helpful info. I'm not a spammer for anyone. I just happened to use that particular system to replace my Vista panel, and so far, had been happy with it. If I was spamming, I'd have probably linked to websites, or some other shit, but you're free to make that assumption. I can see where you might think that though, and I apologize if I came off that way.
Back to the subject at hand, what you said about the installer code sounds familiar. I thought I had read that it only worked if the installer code was still set to default, but maybe it was just a lock thing. I vaguely remember having my better half hold down two buttons on one of the key pads while I power cycled at the main panel, then entering the default installer code to put it into program mode. Once there, I was able to set user codes without issue.