hard drive installation

The hard drive needs to compatible with your system,check the sony web site to research for hard drive upgrade info.

1)Open the case,remove the four screws that holds the drive to case,remove old drive

Install the new drive per the documentation that comes with the drive,make sure you have the connector set,install the drive back in case and then proceed to format and install the operating system

i'd go to www.sony.com and look for the manual for that laptop, then look under upgrading...
Usually it is pretty obvious looking at the bottom of the laptop (turn closed laptop over onto towel laid on your desk top). look for directions that mightbe there...(guess it doesn't say 'hard drive under here' huh? look for sliding covers, screws, labels that screws might be under. maybe the harddrive slips out from the side instead of the bottom... the cases are all different so i look each one up on it's web site, easiest way imho. good luck.

Neither reply answered my very basic question which was "how do I get to the inside of the laptop?" I finally figured it out myself. While the laptop is held together by about 20 screws, there are only 2 screws which need to be removed.
Take out the two screws which are located on the sides of the laptop close to the hinge. Then slide out the bar above the keyboard. Then slide out the keyboard. Voila!