How would i go on about doing this?

I play Counter-Strike:Source and i clicked a link, that installed a Keylogger software, which got my Account name/Password and i know who did it. Now i want to get back at them by sending them a link getting all the Account Name(s) and Password(s), Because i know he plays that stupid game World of Warcraft, Counter-Strike, and some Guild Wars game.

I want to get the info of those Passwords, Account names to all those games. How would i, and what program would i go about using?