please don't post duplicate questions. I deleted your other thread.
You don't need directory browsing.
You don't need cgi
You don't need url authorization but it may be useful
I use Dynamic compression but technically you don't need it, it just may improve performance.
I don't know what IIS hostable web core is, if mojoPortal is working without it then I suppose you don't need it.
Hope that helps,
Joe