[2005] SQL and AD security in same site?

Hey Guys and Gals,

I have a security question for you gurus out there. I'm using VWD 2005 Express edition and I have a site that I've built that requires access to both AD to make changes to user information as well as a SQL database that holds computer information. I am wondering what the best security model is for this so that I can pass the currently logged in user name and password to the AD connection string and use integrated security with SQL Server 2005. Does anyone have any suggestions on how to accomplish this or how I can do this without hard coding a user name and password into web.config?

Thanks,

Jim P.