I need to Automatically Update the system Catalogues on 2008.

Basically I want Automatically remove the extended properties for a given table,

Now I know this can't be done, is there another way around this?

Exec sp_configure 'allow updates', 1 Reconfigure with override

waitfor delay '00:00:01'

DELETE

from sys.extended_properties

WHERE major_id =446624634

Exec sp_configure 'allow updates', 0 Reconfigure with override