there should be some plugins for the Bart's PE CD for reading the MAC as well.
-Or-
nbmac.exe -
http://www.kostis.net/freeware/nbmac-e.htm
note-- you may not be able to test this DOS tool in XP, running XP's cmd.exe as shell is not true DOS. so run it from a DOS boot disk and see if you can get the info you want.
also, you may want try this boot disk...
'Universal TCP/IP Network Bootdisk' Version 5.4
it could be the simplest and most effective tool available. inside the
download package you'll find an instruction on how to build the boot disk.