Windows 7 – Change Default Location
Changing the default location of your personal files is handled very differently in Windows XP and Windows 7.
While in XP this is done through a built-in option, it requires manually actions to perform this in Windows 7.
You can the individual folders in the Properties, Location tab as explained by W7Forums or follow the steps below:
The steps to achieve this is well explained by SevenForums.
after copying the user profile folders and files, change the registry entry
update the ProfileImagePath the attribute in each S-1-5 key