Transferring logins and passwords between SQL Server 2005 and SQL Server 2008

Useful commands I’ve found from various sources for Microsoft Sql Server 2005/2008 include:
EXEC sp_configure
GO
–Instance level principals.
SELECT * FROM sys.asymmetric_keys
SELECT * FROM sys.certificates
SELECT * FROM sys.credentials
SELECT * FROM sys.linked_logins
SELECT * FROM sys.remote_logins
SELECT * FROM sys.server_principals
SELECT * FROM sys.server_role_members
SELECT * FROM sys.sql_logins
SELECT * FROM sys.endpoints
GO
–Database level principals.
SELECT * FROM sys.database_principals
SELECT * FROM sys.database_role_members
GO
ALTER LOGIN sa WITH NAME [...]