C# 2010 small web app

Question

I will describe the current C# 2008/2010 application and then I would describe what I would like to do with a 'new version (clone) of the 'second' program.
 
The current application and that will not be modified does the following:
 
1. A driver program (C# 2010 desktop/console) calls the 'second' program with parameters it needs for the particular run.
2. The second program calls a web service that is supported by another company to upload and download documents from the web service.
 
The 'new version (clone) of the 'second' program:
 
1. The new version of the 'second'program listed above will do the following:
a. A user will access a C# 2010 web form page to enter client number, point to a directory path of where files are located that need to be uploaded to the web service, and click a submit button,
b. The web app will then use the 'existing code' it copies from the progam listed above to load documents to the web service and receive a repsonse fromn the web service.

I would like to know how to setup the C# 2010 web form and use part of the exsiting code?

Would I use something like http://smartclient.codeplex.com/?