Changes

* If a batch file gives a degree of output to the screen it can overwhelm WPKG and the batch script hang. Lessen the output of commands by appending each with ' 1>NUL 2>NUL'. This will prevent commands echoing their messgaes (from use of the echo command), results and errors to the screen and thus to WPKG.

* Where a % character references a variable from within a batch file, where a single % can be used from the command-line a double %% has to be used from within a batch file.

* The Windows shell and some command-line programs don't like spaces appearing in file or directory names. For example when using such wildcards as %PROGRAMFILES% in %PROGRAMFILES%\some-directory\some-program.exe where we don't know whether or not %PROGRAMFILES% contains a space, use "%PROGRAMFILES%\some-directory\some-program.exe"