automatically deletion of objects

FRED has a regular procedure that automatically delete contacts, nssets and keysets that are 6 month unattached and unmodified. Is it possible to mark certain contacts, or set a state, so they will NOT be deleted, even if they are 6 months unattached and unmodified ? This email and its attachments may be confidential and are intended solely for the use of the individual to whom it is addressed. If you are not the intended recipient or authorized to receive information for the intended recipient you are notified that disclosing, copying, distributing or taking any action in reliance on the contents of this information is strictly prohibited. If the email contains proposals, they are valid for 30 days following the date of email transmission. Finally, the recipient should check this email and any attachment for the presence of viruses. The company accepts no liability for any damage caused by any virus transmitted by email.