Passing commandlines to external program

You can use an MS-DOS Batch Mode script to redirect the output from the echo command to a text file, building up the list of commands to run and then run QueueRun.exe on them. (Slightly similar example here, if you're familiar with DOS command redirection.)

Or you can use something like {filepath|filem} to have Opus generate a text file listing all the filenames, and then pass that to an external tool or script which processes the names into the format which QueueRun.exe requires.