I have an old DOS application (yes DOS, not command line) that I need to run on a contemporary OS. Presently this requires setting the following lines in Config.NT: dos=high, umb files=125 device=%SystemRoot%\system32\himem.sys device=%SystemRoot%\system32\emm386.exe NOEMS I'd like to call this application without having to set those options that way ... like set up the environment and make the call to the executable all in one script. Anyone have any ideas? Short of parsing the Config.