Passing vars. to a modal window

[Daniel Howe]

Hi all,
I need to pass a variable to a modal window, so that when it opens some
of the user prefs are pre-filled. A similar example is the CookieViewer
window - if I needed to open that window with the fields for one cookie
pre-filled & I had the id for that cookie, how could I do this? Any help
would be great...
Thanks much,
/daniel