Facebook-friendly controls/settings?

Hi there! I realize this is a bit outside the theme support context, but I'm trying to find ways to make my homepage Facebook-friendlier: I would like to be able to control the image and copy that shows up when I/someone posts my link in FB. I have tried two online tutorials so far with no success. e.g. I tried installing this plugin: WP Facebook Open Graph protocol) Is there something specific to know about Clean Box in this regard? Any pointers would be appreciated! Thanks! Deborah