Thank you! I appreciate the time you took to explain it all to a newbie like me. Now it makes sense. I didn't know there were such things as discrete codes.
I have done some searching here and at other sites and it seems like, since most of my equipement is on the older (and cheaper) side, they don't seem to have support for discrete codes. I was, however, able to find some sites that offered advice as to how to find work arounds for the lack of discrete codes.
I also called the manufacturer of the remote I purchased and discovered there's no way to directly enter discrete codes into it. So I'm sending it back to get a better one that does have that feature. I don't really need it now since my equipment probably can't use it, but if I'm going to spend the bucks on a decent remote I might as well get one that will support equipment I buy in the future.
Thanks again! Just knowing what to call it made it a whole lot easier to find the information I needed on the net!