Patrick,
You could go to
http://www.joeware.net and take a look for 'oldcmp'. This
will help you. Please note, however, that you would have to run this on all
of your Domain Controllers as well as change the filter.....it looks for
computer account objects by default.
There are also some other tools that will do this for you. I might suggest
doing a search in this news group as this question is asked at least two
times a week....
HTH,
Cary