Well, before you even get off the ground, do you have an ASP.NET authoring tool such at Visual Baisc 2005 Studio? Classic ASP can be written in just about any text editor, but I would discourage classic ASP.
Why are they insisting on ASP? Do they already have a site hosting on IIS?
I have a potential client who wants a CMS with ASP.NET pages. I'm not very familiar with ASP or ASP.NET at all. Can anyone help me?