Below are examples of the shellfoldernames.
The need for PBSystempath is obvious.

Shell folders on a Windows NT5-beta2 computer.
[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
       AppData=C:\WINNT\Profiles\Administrator\Application Data
       Cookies=C:\WINNT\Profiles\Administrator\Cookies
       Desktop=C:\WINNT\Profiles\Administrator\Desktop
       Favorites=C:\WINNT\Profiles\Administrator\Favorites
       NetHood=C:\WINNT\Profiles\Administrator\NetHood
       Personal=C:\WINNT\Profiles\Administrator\My Documents
       My Pictures=C:\WINNT\Profiles\Administrator\My Documents\My Pictures
       PrintHood=C:\WINNT\Profiles\Administrator\PrintHood
       Recent=C:\WINNT\Profiles\Administrator\Recent
       SendTo=C:\WINNT\Profiles\Administrator\SendTo
       Start Menu=C:\WINNT\Profiles\Administrator\Start Menu
       Templates=C:\WINNT\Profiles\Administrator\Templates
       Programs=C:\WINNT\Profiles\Administrator\Start Menu\Programs
       Startup=C:\WINNT\Profiles\Administrator\Start Menu\Programs\Startup
       Local Settings=C:\WINNT\Profiles\Administrator\Local Settings
       Local AppData=C:\WINNT\Profiles\Administrator\Local Settings\Application Data
       Cache=C:\WINNT\Profiles\Administrator\Temporary Internet Files
       History=C:\WINNT\Profiles\Administrator\Local Settings\History.IE5
       Content=C:\WINNT\Profiles\Administrator\Local Settings\Content.IE5

Shell folders on a Windows98-DK computer.
[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
       Desktop=C:\WINDOWS\Skrivebord
       Templates=C:\WINDOWS\ShellNew
       AppData=C:\WINDOWS\Application Data
       Start Menu=C:\WINDOWS\Menuen Start
       Programs=C:\WINDOWS\Menuen Start\Programmer
       Startup=C:\WINDOWS\Menuen Start\Programmer\Start
       Fonts=C:\WINDOWS\Fonts
       SendTo=C:\WINDOWS\SendTo
       Recent=C:\WINDOWS\Recent
       Favorites=C:\WINDOWS\Foretrukne
       NetHood=C:\WINDOWS\Andre computere
       Personal=C:\Dokumenter
       Cache=C:\WINDOWS\Temporary Internet Files\
       Cookies=C:\WINDOWS\Cookies\
       History=C:\WINDOWS\Oversigt\
       PrintHood=C:\WINDOWS\PrintHood