mtnmake.cmd - Multi-Taskly NMake makefile with process<total><id>

Syntax:
	mtnmake.cmd [SYSGEN] -n <sessions> [-d] [-w <makefile>] [-v]

Argument : 
SYSGEN         : by default it will define sysgen.err and sysgen.log for 
                 it's standard input / output file

sessions       : number of session you want to run at the same time.
-d             : do not make target directory tree (SYSGEN specific)
-v             : run verbosely, echo executed commands
makefile       : specify full path to makefile in order to run mtnmake.cmd
                 in arbitrary directory (probably %TEMP%)
                 default is to look in current directory
Example:
1. run nmake at 4 sessions
=> mtnmake.cmd -n 4
2. run nmake for sysgen with 8 sessions, 
   makefile sitting in %TEMP%\%LANG%:
=> mtnmake.cmd SYSGEN -n 8 -d -w %TEMP%\%LANG%\SYSGEN.MAK