I was using my powerbook yesterday and it was acting funny (everything would lock up for a bit and then come back to life) Then eventually it froze and gave me this weird screen which I've never seen before and said the machine needed to be rebooted (in multiple languages) So I rebooted the machine, and when it loaded it gave me a greyish background with a folder in the middle, and a flashing ? and flashing finder icon which alternate when blinking. I did some research and saw that the people who had similar problems were told that it can't find where to boot from. So I put in my restore CD, try to run a repair and verify with disk utility and it says it can't because of a invalid b tree node. My question is, how am I to recover my data??? I can't mount the HD. I reinstalled the OS on my external firewire drive but cannot seem to get at the hd data. If it can't mount the HD in the os, will I not be able to boot my powerbook as a firewire drive and connect it to another mac? I tried running it on a PC but couldn't get the drivers on Windows to read the drive correctly. Please help.. I need to restore at least some of those files!! I have no idea how this happened either.