wbadmin start backup -templateId:{...

Hi,
when I schedule a full backup on windows 2008 I find in the task scheduler following Action:

... wbadmin.exe start backup -templateId:{...GUID...} -quiet

I wonder what the option -templateId means. I tried on another machine and got a different GUID.
I wolud like to start the backup with a batch command and wanted to know if I have to use the -templateId option or not.

Thanks Franco