As an addendum the the information from Nathan.
Should you find error messages during boot-up after 'cloning' with Norton
Ghost then you will need to perform a repair install of XP. This will not
delete any of your files, email etc.
XP has certain aspects built in as part of the anti-piracy, including boot
sector data. A repair install will correct variations in detail between the
two physical hard drives.
I have used the Maxtor supplied software and Seagate's both have performed
the function of partition / format and clone very well and without the need
for repair installations.