Session question?

[eluser]Jamongkad[/eluser]
Hey guys! I know this may sound quite basic but I was wondering how can one use session variables to pass data from one page to another.

Like lets say I had multiple forms, the user would fill out data for page 1. Then he would jump to page 2 but still have the data store in a cookie from page 1, and so on and so forth. Until he reaches the final page where all of his data is summarized for him. And he sends it out as an email.

Are there any examples of that type of usage? I mean are there best practices with regards to how to use Code Igniter for such a task?