My problem is this: I find that I hit the enter key above the right shift too often by mistake (usually when I hit the apostrophe). So I removed it and now I just use the keypad enter key, and I'm very satisfied. The only outcome that I'm not satisfied with is that some X apps treat the two keys differently; for example WindowMaker, my favorite WM, says that there is an 'Return' key and a 'KP_Enter' key. XTerm treats the two keys as a return, but RXVT will just beep on input of the keypad enter.
So what I want to know is "Is there a way to give the keypad enter key the same keycode as the regular return so that they act the same?" This doesn't need to work at the text console, since they are already treated the same there, so if this functionality is available in the X server there's no need for me to go any deeper than that. I just couldn't figure this one out on my own, but maybe one of you has the key .

Thanks a lot,
Mike

man xmodmap
man dumpkeys
man loadkeys

Maybe someone else can help you in more detail

Ok, I solved this one, I'll describe my solution here for anyone else wanting to know and for the benefit of general knowledge.

I already knew about the xmodmap command and the .Xmodmap file through trying to solve this one on my own. The dumpkeys command, however, was the missing link I needed to get to the solution. dumpkeys lists all the keycodes for any keyboard layout, and the keysyms that are open for your keyboard. keycodes are the numerical codes that represent which key you pressed, and keysyms are names that reference the keycodes (in my case, the only ones I needed to know were the ones for the two enter keys, "KP_Enter" and "Return"). It is possible to have one key use the same keycode as another within the .Xmodmap file by using a keysym line, in my case all I had to add was:

keysym KP_Enter = Return

And then I was in business!

So thanks again for the help, I hope that someone else looking for the same solution can find this post!