You can change the sa password following the steps outlined here -

http://blogs.msdn.com/b/raulga/archive/2007/07/12/disaster-recovery-what-to-do-when-the-sa-account-password-is-lost-in-sql-server-2005.aspx

I have had to do this once and it worked great.

Here is a synopsis of the...

Try Microsoft SQL Server Migration Assistant for Oracle.

You can download it and see if it works for you.