StoreFront 2000 expects a Microsoft NT 4.0 IIS 4.0 or Windows 2000 IIS 5.0 Server for live web hosting. The StoreFront help files contain a section on IIS Server Configuration and there is additional information available at the StoreFront Web Host support section, where you can also download the UPS shipping component, discussed below. You should review all this information before continuing further, in my opinion.
Also, you may want to visit the StoreFront Knowledge Base and scroll through the server-related articles for tips and solutions to some problems.