Change Path of C:\Documents and Settings

My computer crushed this morning, all datas in partition C was lost, including datas in wwwroot.

I have found there is many files in C:\Documents and Settings\All Users\Application Data\Microsoft Help directory, totally 500M in size. When I use ghost to make a backup image, it would cost more time. So I want to Change the path of C:\Documents and Settings\All Users\Application Data\Microsoft Help, however, after tried about an hour, i found no solution to change the path. I googled a file about User settings in http://www.mrp3.com/windows-user-setting-fix-procedure.html.

May be change the path of HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\ProfileList would work, Then I change all directory under the ProfileList in registry. and it works.

Then all user files, all temp files would be stored in disk F:, when backup system, it would be more quickly.