I have recently come across a PCG-953A. It wasn't hard at all to replace the hard drive, so don't worry.
Here's how i did it:
1) I took out all the screws and covers on the bottom (this is because i didn't know what I was doing at the time, I don't think anything needs to be unscrewed here.)
2)Open the screen and follow the speaker cover with the buttons on it to its farthest left edge, it will change colors to black as it meets the case and there is one screw at the transistion.
3)unscrew aformentioned screw and push the whole blue cover to the right (as you look at it from the front) NOTE: be careful not to loose the little back piece that will fall out of the blue cover. (there is a small threaded plate that the screw screws into, it is only pushed into place on the plastic cover, so mine fell out.
4)Lift the blue cover away and find the two screws for the keyboard. On is located in the middle (above the f6 key) and the other is on the far right side (above delete)
5)Lift out the keyboard.
6)Locate two screws that attach the hard drive's ide cable (mine is a brown folded flat cable) in the middle of the motherboard above the keyboard (you can see it with the keyboard in) and unscrew these screws.
7)Remove the 4 screws surrounding the hard drive (middle left, top left, upper/middle right, bottom right.
8)pull the hard drive directly up and support the mini ide board that you unscrewed earlier. NOTE: the ide cable is attached to the mainboard via a small plug behind the board that the ide cable attaches to.
9)Obviously unscrew the hard drive from its Sony Covering via the 4 screws on its side and be careful to not mess up the little ide board. You might try to remove it before you take the hard drive out its case, or just fanagle it out when you remove the hard drive.
Regards,
Jon Novak
buzz1167@ku.edu