Okay, for control alt-del you have to type NetplWiz.exe inro Run.
Go to the advanced tab and check the checkbox at the bottom.
type MMC into run. Add the snapin for local security policy and navigate to:
Local Computer Policy\Computer Configuration\Windows Settings\Security Settings\Local Policies\Security Options\Interactive logon
You may also want to add the MMC snapin for Local Userss and Groups as i think there is some smartcard options in there as well as under the Local Security Policy somewhere , not 100% sure about smartcards under vista as ive only ever used it under XP Pro in a domain environment (in fact im not even 100% sure if you authenticate smartcards locally, on xp it only supports validating against a kerberos server)