I haven't seen any sites that distribute Dialog Studio except for mircscripts.org. If I remember correctly, Dohcan didn't want people to redistribute it so you could only get it from mircscripts.org. I don't have the original .zip file but I can zip the files up and send them to you if you post your email address or AOL Instant Messenger screen name.
It's too bad there's not an archive of older versions of it. The latest version crashes all the time when I use it
(mostly when I preview the dialog)
