Found these instructions through Google here:
http://keznews.com/3308_Adding_fonts_to_cmd_exe
Be default, the properties on a cmd.exe window allow you to select either Raster Fonts or Lucida Console. You can add other monospace fonts to the list via the registry.
In regedit, navigate to
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\ Console\TrueTypeFont
Notice that Lucida Console is already under this key with a name of "0".
Add a new sting value with the name "00" (yep, that's the required name) and set the data to the name of a monospace font already installed in your C:\Windows\Fonts folder. In this example, I added the Consolas font. It seems that additional entries require names "000", "0000", etc. Names like "1" and "2" don't work. For Pete's sake, why?
Open up a new cmd window, right-click on the system menu, select Properties | Font and there is the newly added font.
I did this because I wanted a more readable font for my PowerShell window, since I've been spending some time staring at it.
source: ferncrk.com
I followed the instructions and made Consolas my default font for cmd. It worked as expected.
Note that it will only accept monospaced fonts.