Vista - Reading certs from cert store

I have a need at work to identify the logged in user, pull public information
from their certificate in order to create a text profile silently for a VPN
application.

I have an applet that can do this, however I will be pushing this script
through SMS and needs to be silent.

I know how to get the user name, however I don't know how to get information
from the cert. Is there a way to use vbscript to read certificate information
directly from the store?

Thanks,
Scot

Sorry let me clarify, the applet is NOT silent. It requires user interaction,
which isn't permissible in this circumstance.

Scot