Two step authentication login needed.

Hi all,

I spent three hours looking this afternoon for a tutorial on how to make a custom login page for WordPress. I saw that I could modify the wp-admin.php file, but when upgrading, it gets overwritten.

What a client has requested is:

1. Log in with the username/password.
2. If confirmed then have another screen that asks another couple questions before authorizing them to move onto the main site.

I can build a wrapper around WordPress, but I run into the upgrade problem overwriting the files again.

Can someone point me in the correct direction.. either a two step plugin or a general tutorial of how to do a custom login page would be great.

Thanks

– Kris