Parallel execution of DXL scripts

Hi I am new to DXL scripting. I wanted to know how to run the DXL scripts in parallel so that can increase the performance of the DOORS. Now I am running a single DXL script as below by keeping this code in a command file and running this using a process.

%DOORS_EXE% -W -batch %DOORS_DXL_FILE% -user %DOORS_USER% -password %DOORS_PASSWORD% -logfile "%TEMP_PATH%\extractRawDataXml.log"
MaheshPatil - Mon May 16 04:09:08 EDT 2011