Implementing Role-Based Security with ASP.NET 2.0 using Windows Authentication and Oracle DB 9.02

Hello,

I followed the steps set in this tutorial : http://weblogs.asp.net/scottgu/pages/Recipe_3A00_-Implementing-Role_2D00_Based-Security-with-ASP.NET-2.0-using-Windows-Authentication-and-SQL-Server.aspx cause I have exactly the same interest on overriding roles with my own instead of the ones set for the user in  windows authentification. The difference for me is that I use an Oracle DB instead of SQL server. I read that there was an "Oracle.Web.dll" I can import from oracle to use the OracleRoleProvider but the thing is I'm in an oracle version not compatible with this dll  !  Any idea what i can do instead?  I'm really a novice in dot net. I read something in the msdn library about implement ...