Managing Exchange Email Text Signatures

W2K3 SP2, Exchang 2K3 SP1, Outlook 2003 ADM file imported.

For some time now I have been searching for a means by which email signatures (not digital), i.e.

Joe Bloggs
Dept1
ABC Plc

can be managed on a group level. Group policy does appear to support the enabling\disabling for the user but does not provide a means by which generic signatures may be implemented.

If anyone has any ideas they would be greatly appreciated.