Replication 2005/2008 Keep Subscriber Table Triggeri

Hi,

I have a SQL 2005 DB that has snapshot replication running on it against a DB that is on a 2008 SQL server. 

My issue is this When the snapshot runs, it wipes out a trigger that is on the 2008 DB only. So it has to be manually recreated each time replication runs (which is only about once a month). How do I prevent replication from removing the trigger on the 2008 SQL table? Note I cannot change the publisher subscription, or modify the 2005 DB

Any help would be greatly appropriated. 

Thanks,

Ian