Can a trigger change a DROP to DELETE?

Question

My company has software running our equipment that records information to a SQL Server 2005 database.  I would like to back up this information via replication.  I cannot do this at present because the information tables have no primary key.  I
cannot just add primary keys to them because every two days the software DROPs one of the tables and recreates a blank table with the same structure.  (If we make the tables bigger than two days or about 10,000 rows the software starts recording nonsense
information due to what I believe is poor database design, but can't change because we do not have any support from the software manufacturer.)
I did try adding a primary key to one table and setting it up for replication; the software apparently just ignored the error of not being able to drop a replicated table and started adding new data to the old table, which is a problem since it risks nonsense
data being recorded.
I had the idea of adding a DDL trigger on DROP_TABLE to instead DELETE all the table's rows (if I could extract the table name from the command...).  Is this possible?  Or would the command try to DROP the table first, get the error about not being
able to drop a replicated table, then abort and never activate the trigger?

Answer 1

Alberto - I did consider mirroring; it is not my first choice for a couple of reasons relating to the (not very good) setup of SQL Server on the main machine.  I'll keep it in mind if the replication proves unworkable.
Scott - As far as licenses, we have a separate license for a reduced version of the software installed on our backup server which enables us to view the backed up data.  Since we already have a license to view backed up data, I don't see any issues
with improving the way we back up.
Ibrahim - That sounds promising.  It's a little above my current level of understanding, so I'll be doing some research on stored procedures and setting up batch jobs. (We currently back up by a manual method, and I'm trying to get something set up
that is automatic and closer to real-time.)