You can export the complete BackupExec config using BEUTIL. Do this after changing anything and store the dump file. BacklupExec does this by default everynight, but if a couple of days go by, you're screwed if you rely on that
You can also dump a job to a text file using BEMCMD see the BEMCMDM Guide (option -o251 )
Or you can dump the job definition from a catalog using CATDUMP see http://support.veritas.com/docs/275545