passing variables again

I am trying to write a script which allows you to build a PHP mailto form online, but I am stuck if you go to www.wisemonkeydesign.co.uk/wise/mailto.htm after step 3 when you have to create, ho do I pass the HTML code and names of the fiels into the next page. for instance the user has choosen three fields and a text area and if you look at the source on step three <input type="text" name="???????"> <input type="text" name="???????"> <input type="text" name="???????"> <textarea name="?????" cols="??" rows="??"></textarea> how do I transfer that code into the form.It would be easy enough if there was a set number of fields. TIA george