add (after @echo off) at top of bat, cmd, and awk files that contain
 references to %ProgramFIles% and/or %APPDATA%
---------
rem set T21HOMEDRIVE=Z:
set D4GLSRVHOME=%T21HOMEDRIVE%\4glsrv

rem set WINUSERAPPDATA=%APPDATA%
rem set WINUSERAPPDATA=%HOMEDRIVE%\WINDOWS\appdata
set WINUSERAPPDATA=%T21HOMEDRIVE%\appdata
---------

all occurances of
%ProgramFiles%\4glsrv
become
%D4GLSRVHOME%

all occurances of %APPDATA%
become
%WINUSERAPPDATA%