If you can plug a appliance into a wall outlet, or charge your notebook you can do this. Actually the hardest part will be opening the packing material, so I will start after that is done.

At this point you have 2 things in from of you, item 1 A Sata Hard disk drive, and A Hard disk enclosure.

Step1) The Enclusure is usally help in place by 2 screws on one end locate the screws and remove them.
Step 2) The cover will then slide off, you will then see 2 connectors, one is power and one is interface. They are keyed so they can not be put on wrong.
Step 3) Connect the hard drive to thes connectors, there is only one possible way for this to be done.
Step 4) Using supplied screws attach the HD to the enclusure. After connecting the cable the HD will be sitting on a drive tray. The tray has holes in the side for screws, line the hols up with the holes for screws in the HD (one will do, I usually skip this step).
Step 5)Slide the cover back on and screw back together.
Step 6) Attach power cable and Firewaire cable to enclosure.
Step 7) Plug enclosure into power source connect Firewire cable to computer, please note this can be done while the computer is running.

At this time Windows will tell you it found new hardware and will tell you it is ready for use. You now have a new HD on your system. Honestly you may need to format the drive and create a partition, if you need to know how that is done let me know I will provide easy instructions. Or you could just use the CD that came with the HD, if you get a Seagate or Maxtor the utilities are very good.

You can do this, my instructions make it seem harder that it actually is.