I am thinking of replacing my 80 gb hard drive with a 160 or 250gb. I have an older computer, Sony vaio rz22G. With the computer we received system recovery disks. Which basically allow you to restore your computer to original factory settings. If i took out my old hard drive, and put the new one in, ran the cd, would it install the O.S. and pretty much work. I believe it would, but im worried about partitions, on here its dedicated 13gb to C: and the rest of it to the D: drive, and im not sure if there is an option to set it up yourself on the disks, and even if there was, would it be able to format the 250gb? Thanks.