Hi,
In theory we (non symantecs) could modify /data/scanner/etc/Notification*.xml BUT are missing w permission.
This leads to your question: No, not possible.
You can only
- delete the messages and send notifications to the user or
- archive the message (sent via smtp) to a 3rd party product (eg other virus scanner) which can change the message
In europe, from a legal point of view - on way
Regards
Thomas