> but then I'm > forced to use the SI command prompt and to be honest I'm not even sure how > to call that thing from within a bat file since call "C:\Program > Files\Autodesk\Softimage 2013 SP1\Application\bin\SIShell.bat" doesn't seem > to work.
The SI command prompt is just a normal command prompt that calls setenv.bat. so you can just call setenv,bat directly in your own batch file to set the environment variables
