Script for alert creation (merge replication):
USE [msdb]
GO
EXEC msdb.dbo.sp_add_alert @name=N'Conflict',
@message_id=0,
@severity=0,
@enabled=1,
@delay_between_responses=0,
@include_event_description_in=0,
@category_name=N'[Uncategorized]',
@performance_condition=N'SQLServer:Replication Merge|Conflicts/sec|Merge Replication Agent Job you wish to monitor|>|0',
@job_id=NewID()