Oops, I forgot one more item you're going to need. You will need the below cord to power your hard drive.
OKGEAR 8" molex 4pin male to 15pin SATA power and molex 4pin female Cable - $3
http://www.newegg.com/Product/Product.aspx?Item=N82E16812123120
Here are some instructions I've put together for installing a hard drive. If you have any questions just ask.
Electrostatic discharge (ESD) is simply the discharge of built up static electricity. Electrostatic discharge however, should not be taken lightly when working with computers. Electrostatic discharge has the capability of causing enough damage to the components inside your computer to render it completely inoperable.
Only 10 volts of electro static discharge can damage computer components. Walking across a carpet can generate up to 12,000 volts of ESD (electro static discharge). Electro static discharge is especially a problem in dry and cold climates.
Electro Static Discharge can cause two types of damage in an electronic component: catastrophic failure and or upset failure. Catastrophic failure destroys a component beyond use. An upset failure damages the component so that is does not perform well even though it may function to some degree. Avoid touching chips or traces on any computer chips as you handle them. There is danger of electro static discharge damage.
Always place one hand on a bare, unpainted portion of the back of the computer before working inside the computer case to discharge any static electricity.
1) Turn off the computer.
2) Open the computer case after doing electro static discharge precautions. Remove both sides of the computer case for easier access.
3) Set jumper settings on the back of the hard drive for slave.
4) Find an open bay that the hard drive will fit inside.
5) Put the hard drive in a bay flush with the front of the bay.
6) Line up the drive with the bay screw holes and make sure everything will fit. Install four small screws (two on each side) to mount the drive in the bay. When installing a hard drive do not allow torque to stress the drive. Don't force a drive into a space that is too small for it.
7) Connect the power cord from the power supply to the hard drive.
8) Connect the serial ATA cord to the drive and to the serial ATA port on the motherboard.
9) Turn on the computer after installation is complete.
10) Press F1, F2 or the Delete key immediately on boot up to go into BIOS. Set the drive as a slave.
11) After you're sure the drive is working replace the side panels.
12) The hard drive will then need to be formatted before you can use it.