Installing to Win 2003 server

I have to install InstantRails (1.4, the latest & greatest) on a virgin
Windows 2003 Server (32 bit version).

I know this thing comes with IIS on it, but I want to bypass that
altoghether and simply run Instant Rails.

Surely someone in the group has done this before as this particular
type of server is quite ubiquitous. Can anyone tell me what I must do
(aside from unzipping the InstantRails zip file!) to get this to work
on this server? Any way to put IIS to sleep for good on this thing? Any
pitfalls to watch out for on this configuration? Thanks in advance.