Snow? What snow?

Which of these tools can be used at the command line to migrate user information between Windows operating system versions?

Migrate me to the moon

You have a user in your organization that needs to migrate his Windows XP system to Windows 7. What application would the best choice for this task?

I like to move it, move it

You are upgrading a user from Windows XP x86 directly to Windows 7 x64. What utility provides an automated way to move the user’s profile from one operating system to the other?