Convert VS 2003 project to VS 2005 web application
In this post, you will get an idea about the process of converting a VS 2003 project to VS 2005 web application. The web application project uses the same approach of a web project including the compilation into a single assembly.
Web Application projects in VS 2005 requires you to install an add in and an update
1- VS 2005 Service pack 1
2- This is an update to support Web Application Projects available as a Visual Studio 2005 add-in
Then all you need to do is to open your VS 2003 project using the VS 2005 so that the conversion wizard will run.
For more information, Check the below link
http://msdn2.microsoft.com/en-us/library/aa730880(vs.80,d=printer).aspx
Hope this helps,
HC