[SOLVED] Adjusting Post Width and Setting Justify Align

I want to say thanks to the creators of this theme, all of the customization options are great.

I'm having an issue with a blog template I'm working on ( http://www.purpletapepedigree.com/ ) -- I was hoping to get the copy in each post the same width as some of the larger photos posted on the blog (about 650 pixels). I've been researching older threads on the forum that discuss the issue but have not found a solution.

I was also wondering if it is possible to set the alignment of the text to default as "Justified", instead of having to select it in the toolbar every time something new is posted.

Any help with these problems would be appreciated.