Can only tell you that removing and fitting the new hard drive is so easy that even I could do it.
The hard drive should just pull out but check that there are no screws holding it in.
Once out there should be 2 screws either side of it which have to be removed which lets you remove the support frame.
Put the support frame on the new hard drive ad both screws to either side and push it in to the laptop.
Now that was how easy it was on an Acer so would imagine most laptops would be similar.
There were two screws on the underside case which hold the new hard drive in place.
Should only take about 5 minutes to do.
You may have to wait for responses from others as I could not sign in using I/E.