to use other domains/IPs/WebSites, you'll need to know those names before setup.
Either go to the IIS console and make a note of the name or run the following
code from Visual FoxPro:

IISOBJ = getObject("IIS://LocalHost/W3SVC")
For each Object in IISOBJ
if (Object.Class = "IIsWebServer") then
? "WWW Site: " +Object.Name + " - " + Object.ServerComment
endif
endfor
----

Let me know what it says. Rerun PostSetup (from the menu) with whatever the name is.