I put in the effort to move my user's profiles onto a different drive.
I'd like to do an upgrade to Windows7, but I'm wondering how I can import the exiting users on the second drive into the new install.
I know that Windows Easy Transfer exists, but that requires copying the data to other media, is there any ability to add existing users?
Have a look at the User State Migration Tool: http://technet.microsoft.com/en-us/library/dd560801(WS.10).aspx.
Registry Settings for Folder Redirection in Windows or How to Change a Personal User Folder Location in Vista