Well, I don't know that placing cookies in the Struts of my car will help anything. I definately would not want to eat them afterwords (if there were anything left of them). ;-)
Edit: And please don't get all Huffy, it was just a joke. And I'm sorry, but, I can't help you. I have only sparingly used Struts (and that quite a while ago).
To write a cookie in Struts, you create one and add it to the response object. (response.addCookie(cookie)).
To read it, you use the bean:cookie tag.
As to use cookies to get a given value from one form to another, there might be better ways, like using request attributes.
You might be better off keeping those cookies in the jar, after all.