I can't figure out how to justify all of my text - I want all of the lines to start and end in the same spot. But all of my justification buttons are greyed-out. I can do left, center or right alignment, but that's it.
In order to use the justification tools you need to have created a text box instead of just clicking and starting to type. Click the type tool and drag to create the text box, then those options should be available.
You can also select what you've typed, and convert to paragraph text by right clicking on the layer in the palette. That should give you the same options--it's how I did it in CS2 and now in CS4.