Doesn't the cookie in Snitz work on what you have in your config.asp look for:
strCookieURL = Left(Request.ServerVariables("Path_Info"), InstrRev(Request.ServerVariables("Path_Info"), "/"))
(at about line 125 in a fresh copy) And hard code the name of the cookie in it. Correct me if I am wrong, but I think that line creates the name of the cookie. Rather than have a varibale that the Snitz cookie is, you would need to hard code it.
I hope that gives you something to go on.