Addison, try rubybox_0.4.0.deb. It's not perfect, but it tries to parse the keyboard size and then show it at the defined position. Most problems can be fixed by fixing the keyboard file so that it defines col width and height at least once for every row. Also the xkbd geometry parameter works pretty weirdly imo, let me know if you have suggestions on how to fix it.

Thanks for the ArnimS info, should have checked better, it's just that I haven't seen his posts in ages.