how to run multiple ready api composite projects in parallel ?

I do not see anything when looking at command line options for the testrunner

Here are the options

-a Turns on exporting of all results
-A Turns on exporting of all results using folders instead of
long filenames
-c <arg> Sets the testcase
-d <arg> Sets the domain
-D <arg> Sets system property with name=value
-e <arg> Sets the endpoint
-E <arg> Sets the environment
-f <arg> Sets the output folder to export results to
-F <arg> Report format. Used with -R. Valid options PDF, XLS, HTML,
RTF, CSV, TXT, and XML (comma-separated)
-G <arg> Sets global property with name=value
-g Sets the output to include Coverage HTML reports
-h <arg> Sets the host
-H <arg> Adds a custom HTTP Header to all outgoing requests
(name=value), can be specified multiple times
-i Enables Swing UI for scripts
-I Do not stop if error occurs, ignore them
-j Sets the output to include JUnit XML reports
-J Sets the output to include JUnit XML reports adding test
properties to the report
-l <arg> Installs an activated license file
-M Creates a Test Run Log Report in XML format
-m Sets the maximum number of TestStep errors to save for each
testcase
-O Do not send usage statistics
-o Opens generated report(s) in a browser
-p <arg> Sets the password
-P <arg> Sets or overrides project property with name=value
-r Prints a small summary report
-R <arg> Report to Generate
-s <arg> Sets the testsuite
-S Saves the project after running the tests
-t <arg> Sets the soapui-settings.xml file to use
-T <arg> Runs only test cases that have the specified tags. Format:
-T"TestCase tag1[, tag2 ...]".
-u <arg> Sets the username
-v <arg> Sets password for soapui-settings.xml file
-w <arg> Sets the WSS password type, either 'Text' or 'Digest'
-x <arg> Sets project password for decryption if project is encrypted
Missing project file...
C:\Program Files\SmartBear\ReadyAPI-2.0.2\bin>