If you do not know the logins, you can try to add them with a SQL script. Note, if they have updated their hash algorithm, this may not work for SQL 2000 -> SQL 2008For each login, find the SID, and hashed password from SQL 2000select name, sid, convert(varbinary(255), password)from syslogins
From this, create CREATE LOGIN statements for each login using the HASHED keyword for the password CREATE LOGIN testlogin with password = 0x12382387 HASHED, SID = 0x02835256
http://msdn.microsoft.com/en-us/library/ms189751.aspx