5 days ago my laptop wouldn't boot up. I got a flashing folder with a question mark. I found out what it meant but I did not have my install disks with me to fix the problem. My laptop had Leopard and was upgraded to Snow Leopard. I burrowed a Snow Leopard disk from my friend who had a MBP, it took a while to boot up but did and in the disk utility I could not see my hard drive. I determined that it must have died/been corrupted. I finally recieved my new hard drive today and it has been installed, I put in the install disks but when it loaded it said OSX could not be installed on this drive. I didn't know if its because I have not formatted so made a partition with Mac OS X extended (journaled). I restarted but again it said it can't be done. I went in disk utility and the hard drive is there so I'm sure my other one had died. It suggested I resume from a timemachine back up, but if there is no OSX on the drive, this won't work will it? So what have I done wrong/what else can I try. Should I be using my install disks? Please help, I need this fixed as soon as possible.