One way Replication N to 1

Hi, Im new to Interbase replicator, im doing One way replication N to 1 that is N source databases to 1 target database. However, the tables in the target database contains 1 more field compared to the source database. The field is call ProdLine which is to identify 1-N source databases in the target database. For instance, for source database 1 will be identified by ProdLine = 1 at the target database, source database 2 the prodline = 2. Is it still possible to do the replication ? Please advise. Is there any special setting i need to set in interbase replication manager ? Another question, what is create system object for ? i tried to create system object at Group(S) it fails gives me error: "unsuccessul metadata update keysize too big for index RDB$Primary10" i tried to create system object at Group(T) it fails and gives me error: unable to complete network request for host "server." my target database is in a remote location: server:\\CPQ26792268802/BTrekData/BTREKML.GDB anything wrong with my path ? Thanks