ALTER TABLE dateAuto

I must add to an existing TABLE a column DateInsert
with a default value = date auto
if a new row is added the column must add datetime.now automaticly (like in acccess 2000) how can I do it ?
for MS SQL 2000
thank youCREATE TABLE #patp (
id INT IDENTITY
, asof DATETIME NOT NULL
DEFAULT GetDate()
, other VARCHAR(10) NULL
)

INSERT #patp (other) VALUES ('One')
INSERT #patp (other) VALUES ('Two')
INSERT #patp (other) VALUES ('Three')

SELECT * FROM #patp
-PatP|||alter table MyTable Add
DateAuto datetime CONSTRAINT DF_DateAuto DEFAULT (GetDate())|||thank you Pat Phelan and hmscott

great ! and fast !!!