Requiring client certificates along with name/password ...

Is there a tech doc or Web page out there somewhere that details specifically
how to implement security on an IIS 6 site that requires (and distributes?)
client certificates along with a user name and password for authentication?
Ideally we would like to set-up a secure IIS site that requires both
certificates along with a name/password, but the few tech docs that we have
come across so far seem to leave some steps out. Is there something that
details, step by step (with screen shots perhaps?), how to install CA Server
as well as configure the certificates and file/iis permissions for this ?
TIA ...