The following command-line string will run regedit on all machines and add the registry key and string value specified in the bb.reg file (see below).
cmdjob -jobname "set bb registry" -manager managername -perserver regedit /s \\fileserver\pcsetup\bb.reg
The bb.reg file:
Windows Registry Editor Version 5.00 [HKEY_LOCAL_MACHINE\SOFTWARE\Autodesk\backburner\2012] "CfgPath"="c:\\Program Files\Autodesk\Backburner\\Network\\nrapi.conf"