Yes there is a program called SQL compare by red-gate software. I have it and use it. It works pretty nice. Download the demo on their site:
Mabey they have a referal program, tell them I sent you ;)

http://www.red-gate.com/


>Hello
>
>I have several facilities of a system that has as back end SQL Server 2000, my problem it is as upgrading each installation when I make changes in the program and in the database. Is There some program that allows me to compare two databases and to verify the differences and that it upgrades them to me automatically?. Does some utility exist inside SQL Server 2000?.
>
>Thank you for the help