["Phillip Jordan" <philajordan@xxxxxxxxxxx>]

Guy, thanks for the reply - you wrote:

For MAC addresses, they come from "/etc/ethers" on UN*X and the "ethers" 
file in the directory in which Ethereal was installed on Windows, or from 
$HOME/.ethereal/ethers on UN*X or the "ethers" file in the Ethereal 
subdirectory of your "application data" directroy on Windows.

I used the "manuf" file - it was in the Ethereal install directory 
(C:\Program Files\Ethereal).  I couldn't find the "ethers" file you mention. 
 I checked the install directory, and I also checked my Application Data 
directory - there was no subdirectory for Ethereal (C:\Documents and 
Settings\myusername\Application Data).  I didn't see an "ethers" file in 
either.  I also checked the "etc" directory (C:\Program Files\Ethereal\etc) 
but didn't see an "ethers" subdirectory (there are gtk-2.0 and pango).  But 
I was able to do what I needed with the "manuf" file.  (The manuf file 
contains this line - "This file is in the same format as ethers(4)"...)