great idea!! thanks for your help
Glad to help.
Please be aware that you cannot just put your existing HD in a new system and have it work. The HD will be
looking for all of the old components and might not even boot into Windows.
Here's a link to some discussion about doing this: http://www.computing.net/answers/hardware/new-system-old-hard-drive/19776.html
You can also do a Google search How to install an old hard drive in a new system