How to get Popup Pro or something similar to open login/registration forms when user clicks on link

Hi,
I'm looking for a popup, like popup pro, which allows for css selector and id targeting, so when a user clicks a particular link a popup will display with a login and registration form. I have already tried Popup Pro with "zm ajax login & register" and "CM Registration". The short codes provided by the registration plugins render correctly, but when I try to login or register, ZM ajax would not refresh correctly on login and CM Registration forms were unresponsive. Is there some way I can accomplish this with code or plugins?
Thanks