I recently downgraded my iBook back to Tiger a few weeks ago. I wanted to do a clean install and I had left my Leopard disk at school. After the install I found my iBook to work just great with Tiger and was content with keeping it that way. I keep all my music and photos on an external hard drive, so it was just a matter of relinking the libraries in iTunes and iPhoto. Anyway I came back to my computer tonight, just surfing the net like usual, and all of a sudden I get the ominous gray box: "Please restart your computer. Hold down the power button and then restart." I did a bit of research on the other computer in my house and I think came to the conclusion this is some type of kernel error. Now whenever I try to restart the computer, it doesn't get much past the login screen until the error comes up again. I can't even hit the back arrow at the login and try to shut down properly. I've probably had to hard-restart my iBook over 10 times now, Im really freaking out. I love this computer. I have the install CD disk 1 for Tiger. How do I boot from this? I really really, really want to be able to at least drag some files from my desktop to my external before I can be ok with wiping the drive. How can I recover some files? How bad is this? Please help, I should've headed to bed a long time ago but Im pretty worried. My stats are in my signature, thanks.