How to change SQL2005 Express server collation ?

Hi:
How to I change SQL2005 Express server collation ?
In SQL2005 Standard I use:
start /wait <SQL2005 installation folder>\setup.exe /qb
INSTANCENAME=MSSQLSERVER REINSTALL=SQL_Engine REBUILDDATABASE=1
SAPWD=<NewStrongPassword> SQLCOLLATION=SQL_Latin1_General_CP1_CI_AS
but in SQL2005 Express the C:\Program Files\Microsoft SQL
Server\90\Setup Bootstrap\setup.exe seem not work
Please help
JCVoonHi:
Never mind, my problem solved.
JCVoon