the western Digital Drive you purchased should have come with "Data Lifeguard Tools" software.
first, you need to install the new drive while keeping your old one intact.
first, you would need to remove the case
if your drive is SATA, find a free plug and pop it in. If it's IDE, you'll need to decide how it must be jumpered.
if the other device is jumpered for Master, set the new drive to slave. if it's set to slave, set it to master.
If it's set for CS (Cable Select) set the new drive for cable select.
Once all is connected, start the machine. If your case opens via the removal of it's sides, I recommend leaving them off for this short period; you'll need to get in there soon.
Your current operating system should boot as usual. Now install the data lifeguard tools from the CD.
when you run the software, it should automatically find the new drive and ask you wether you want to set it up.
Using the software's "drive clone" feature should be a breeze. Once you've cloned your system drive to the new drive, power down the machine, remove the old drive, and install your new drive in it's place (remember to change the jumper if necessary).
power back up, and you should now be running with the new drive!
hope this helps you out
