Passing associative arrays between forms

Hey everyone-- I have a multiple page form (it's three pages long) and I am trying to pass an array between each form using the implode() and explode() functions. However, I would like to keep the associative properties of the array I create and not have to keep track of what position [0], [1],...[99] are. Is there any other way to pass array's between forms besides using the implode() and explode() functions? I've already tried cookies but I have too many values for the browser to handle (I have over 20 variables to pass between each form). Therefore, cookies won't work. Any how, any help would be much appreciated!!! :) Thanks in advance... Jay Paulson