Free Trial for photoshop CS4 or just cs2?

First of before anything I am aware that photoshop cs2 is a older version "blah blah blah" I don't care if you think it's a older version I just want it because of the things it has etc. Don't meant to sound like a snob but i'm tired of people writting me saying cs2 is sooo old why do you want that. Anyways Does anybody know of a official free trial that I can get...Every one i've been to is full of b.s. lol if you know please let me know...Thanks sooo much! xoxo