Single Page .net WebSite in C#

We need a very straightforward web-application written in C# .net 2.0 in Visual Studio 2005. Workflow of the project. There is a download of one travel agency with all the data of the employee of the company. These data musst be read into a MS SQL Database. Can be done by a admin webpage or by an additional? windows-app. The data contain a email-field. The application has to use windows integrated authentication. There is an existing table in the MS-SQL Server where a mapping of the NT_USERNAME of the logged in user to his email-address is available. If a company-employee opens the webpage he should get all his data displayed in a editable? grid. Usage of DevExpress components would be ok (we have licenses). He has also to confirm that the data might be transfered to the new travel agency (by checking a checkbox). After all employee have corrected their records an confirmed the transfer, the data has to be written back to an Excel file. This can also be done be an additional admin-page or by windows-application. That's it. So the project consists of writing 1 aspx-page in c# and one tiny windows import-export application.? OR 2 aspx pages (one for the data on as admin page for import and export)