I just got a macbook and have photoshop cs4. The problem is i've never used photoshop and always used microsoft image editor when I had a pc. I'm baffled with photoshop cs4 and can't even figure out how to do much of anything. Does anyone know of any good sites that can walk me through from the beginning? I looked on the adobe site and they have stuff but it is very hard to understand. I do not have a manual because this program was given to me without a manual