This is possible. First, create user account as usual, using Control Panel or lusrmgr.msc.
- Reboot PC and login into your newly created account. Your new account will be assigned profile folder, located at C:\Users\xxx (let's assume "xxx" is the name of new account).
- Now open regedit.exe and navigate to path "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\ProfileList". You'll see the list of all users on a PC.
- Alternately click on profiles, whose name starts with S-1-5-21 until you find profile with "ProfileImagePath" equal to C:\Users\xxx.
- In this profile change value of "ProfileImagePath" from "C:\Users\xxx" to the path of your old profile, for example to "C:\Users\Administrator".
- Reboot PC and you'll discover that user xxx has new profile folder. To confirm it, open CMD and enter %USERPROFILE%. The output would be:
'C:\Users\Administrator' is not recognized as an internal or external command, operable program or batch file.
Personally, I have two user accounts, which share same profile folder. One account is Administrator, another one is SYSTEM (S-1-5-18).