[Plugin: FancyBox for WordPress] Different sizes of iframes for gravity forms and Newsletter plugins

Hi!

I’m trying to use this plugin with gravityforms and Newsletter plugins, but I’m having a problem since all forms are different sizes…

In this link there is a way to customize the sizes but whenever I try doing something like this nothing works…

I’ve tried uninstalling fancybox for wordpress and following these steps but fancybox stops working…

With Fancybox for wordpress, fancybox works, but I can’t customize iframe windows…

Any suggestions?

Thanks!!