从一个ASP.NET代码库运行多个站点并转移到ASP.NET MVC

I have a reasonably large project at work that I've inherited. It's an ASP.NET 2005 website project and two C# library projects for data access and some business logic. The code actually runs 6 different database driven websites. It displays different images and text for each site based on logic that examines the URL and uses a series of Web.config values and switch statements.I have a reasonably large project at work that