Is there any app that will compare .plist files with all of the software you use to let you know what you can get rid of or not. No programer I so most of the designations mean nothing to me. A few, like* DVD Bookmarks* , which I assume are placed there each time I pause a DVD, can be deleted without worry about trashing something I really need. But I know there are things there that just take up space. Can a few hundred of these affect performance/speed?