With proper backup software like Norton Ghost for example, you can put them on any hard drive you like provided it is big enough.
Rik from RCE
Nearly a Posting Maven
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It will depend on what windows version you are using and what drive letter you put it on.
You may well also need easyBCD to sort out your boot - http://neosmart.net/dl.php?id=1
Rik from RCE
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