dbutil - how to target a different group?

[eluser]da_n[/eluser]
Realised I should probably have mentioned the errors. There are loads that come, here are the first 4:

Code:

A PHP Error was encountered

Severity: Notice

Message: Undefined property: Backup::$db

Filename: libraries/Loader.php

Line Number: 278

A PHP Error was encountered

Severity: Notice

Message: Trying to get property of non-object

Filename: libraries/Loader.php

Line Number: 278

A PHP Error was encountered

Severity: Notice

Message: Undefined property: Backup::$db

Filename: libraries/Loader.php

Line Number: 278

A PHP Error was encountered

Severity: Notice

Message: Trying to get property of non-object

Filename: libraries/Loader.php

Line Number: 278