Good One !
Really, I was looking forward for a solution, i.e. My Contact Forms should be opened in a Pop-up & if this could be a lightbox, it would be the greatest solution for my problem.
I got this plugin. Greato, I must say.
Don't forget to try the following extensions as well.
To store the Contact Form queries in a Database :-
To get the POST/Page URL or info in contact form :-