How can we update RT_STATUS file

[dstest]

I am using this query to get warning limit for a job.
SELECT @ID FMT '40L', EVAL "@RECORD<18>" WARNLIMIT FROM RT_STATUS751 WHERE EVAL "@RECORD<1>" = 'JOB';

Is there any way i can update the warning limit to 5.Can any one help me with query to update RT_STATUS table

Thanks

[ray.wurlod]

Use Director client.