I have issued myself a Code Signing certificate from a certificate server. I have also issued myself the root certificate from the same certificate server. The root cert
On your verify command add in the /pa option to tell it to use the Default Authentication Verification Policy instead of the Windows Driver Verification Policy, meaning it will look at your certificate stores instead of the limited set of CAs Microsoft trusts with drivers.
Look here for more options: http://msdn.microsoft.com/en-us/library/8s9b9yaz(v=vs.90).aspx