If you don't feel comfortable to do this, you can try the other way like cloning. I did the both way ( backup and cloning ) to protect the data/programs too.
If you have the WD HDD, use the " Acronis True Image WD Edition Software "
http://support.wdc.com/product/downloaddetail.asp?swid=119&wdc_lang=en
If you have the seagate HDD, use the " DiscWizard "
http://www.seagate.com/support/downloads/discwizard/
In this method you can get the exactly the same copy of the drive.