Cookie reading?

Hey. I am trying to integrate WWF to my other applications on my site. But in the WWF cookie the username UID is storede encoded, UID=username72348784723847247, or something like that. And when you try to get the
("WWF")("UID") cookie, you only get some numbers like "34324242". I have tryed to find the script that saves the cookie in both "Login_user_test.asp" and "common.asp" but i could not find where the username i stored. It is beacause i want to have a little table saying "Welcome & username from cookie &" on my site in every page...So my question is: Can i decode the numbers or store the username in another way in a cookie?