How to locate a Registry Profile on Terminal Server

Open HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\ProfileList
Select the first folder, and looking at the "ProfileImagePath" Key on the right pane, scroll down through the listed folders until the profile image path listed matches the user profile that must be modified, and note the folder name under Profilelist for that profile.
Navigate to HKEY_USERS\ and locate the folder with the same name that was noted in step 2, then proceed with the modification, treating this path the same as HKEY_CURRENT_USER.