Selection of Hard Drive
Selection of the right hard drive is the first step towards implementation of your upgrade project. Being aware of your Macbook's specs will help you pick the right drive. You should select the hard drive that is compatible to your laptop's operating system. If your laptop does not accept a hard drive that is meant for Windows, do not buy one.
Remove Old Hard Drive
Once you have made available new drive, from back of your laptop unscrew the place where the drive is placed and remove it carefully. Take extra care while unscrewing the patch as no damage should be caused to your drive. Then replace it with the new one in similar way.
Format New Drive
Although it is not necessary, you can format new drive. This will clear the drive of all used space and give you all space free. Also, use external drive via Time Machine for data backup.
Reinstallation of Operating System and Data
Once your new hard drive is at position of the old or removed one, use OS X Leopard disc to re-install operating system. You can also restore your backup data from external link via Time Machine. From the disc you can select utility tab and from main menu click re-install from restore. If you are re-installing from external drive plug it in and the process is completed.