OK, here is a way to do it (but it is not an easy
solution).

1) You need to use certmgr.msc on the Vista Client
2) You need to generate Custom Request in the console
(see Create a Custom Certificate Request in the Help
file).
3) Best to add Custom subject information (be sure to
include an Alternate Name that includes the User
Principal Name
4) Save the file to a PKCS#10 request

Create a custom v2 certificate template that allows the
Subject to be created in the Request. Base it on the
template you want to use (for the love of G*D, do not
use User <G>) Ensure that the template is available at
the CA you are using. Assume it is named VistaUser

You now use the Certsrv Web page to submit the request
1) Connect to https://CAName/certsrv
2) Provide credentials from the domain
3) Choose Request a Certificate
4) CHoose Advanced Certificate Request
5) Choose Submit a certificate request by using a base-  
64-encoded CMC or PKCS #10 file, or submit a renewal
request by using a base-64-encoded PKCS #7 file.
6) Paste the contents of the file created in the first
procedure into the Saved Request box
7) Choose the VistaUser template in the Certificate
Template sectino
8) Click Submit
9) Save the issued certificate to a PKCS#7 file (all
certs in the chain)

Go back to the Vista box
1) Import the PKCS#7 file
2) Put all certs in the Personal store (for now)
3) Once the import is complete, move the CA certificates
into the appropriate stores (root in the root, all other
CAs in the intermediate store
4) Use the certificate

Brian
P.S. Please do not ask for more detailed steps <G>

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