I'm on my Mini now. I was trying to do some theme business on my macbook and screwed it up. I stupidly followed some guy's tutorial on installing his theme on my Macbook. I went into System folder and installed some src files. God. Then I went into Terminal and typed some command in. I don't know what it is, everytime i start firefox it crashes. If I click anything in the menubar it just jumps, i can't pull any menu down. when i open a folder the buttons are grayed out and if i try to click the buttons my screen just starts jumping and i pretty much can't do anything. I hope someone knows the fix or knows what i am talking about. i gotta get this back up and running! Is there anything on mac like on windows "last known good configuration" or something?! I can still type in terminal. what can i do?!?!?!!?