PHPass Help

Hello,

I cannot find any information or assistance on this issue.

I have WP 3.0 running in a custom template. My client needed a new page outside of the template which I am happy to accommodate, however, the page requires authorization of their current WP users. In the past I have been able to share the user table for authorization but now that they’ve converted from strict MD5 to this new PHPass (wp-includes/class-phpclass.php), I can no longer hash/encrypt a password to match what is in the database. I did read somewhere that I could convert back to MD5 but my client does not want to do this as they prefer the extra level of PHPass security. I do as well.

My question is, how do I hash/encrypt a password from a form to match the password in the database in this new PHPass method?

Thank you so much, I hope someone can help me.