We need know more about the certificates, that you want install.
Are they computer unik, or do the certikate-file creates it on install?
The certifikate file is it a .exe or equal filetype, so that you just click and the certifikate is created / imported.
If yes on that , you just add the file to software install under computer in group policy-management.
If you haven't create group-policy management yet, is will be a bigger work to explain in this.
You will then have to read all the areas in MS-help about that.
Alternative version can be through certificat management
http://www.microsoft.com/windows2000/en/advanced/help/default.asp?url=/windows2000/en/advanced/help/sag_CMinstall.htmBut we need to hear more about the type of certificates.
http://www.microsoft.com/resources/documentation/Windows/2000/server/reskit/en-us/Default.asp?url=/resources/documentation/Windows/2000/server/reskit/en-us/prork/prab_ups_jlds.asp