Hi everyone, I am sorry if this has been posted. i tried to do a search to help me out but was unsuccessful. I just upgraded my hard drive to a 500gb hard drive on my 2006 macbook and need to reinstall Tiger. I seemed to have lost my installation disks when I moved. Since my friend has the same model as me, I borrowed hers but when I tried to install it, its says "this software cannot be installed on this computer." Is there a way to get around this? I tried partioning the hard drive but that didnt work either. Any suggestions would be great! Thanks and Happy New Year!