I am a programming newb and I just bought the book "Software
Engineering for Internet Applications," and I need a server to go
through the labs.  Unfortunately, the extent of my server experience
is using script/server in Rails.  To do these labs, I need to write
webpages in Ruby without Rails (or any framework), but I am not sure
exactly how to go about it.

I started to use the Apache 1.3 webserver that comes with os x and
attempted to install eruby.  That doesn't seem to be working.  I am
thinking there has to be an easier way.  Is there a way for me to use
Mongrel or Webrick outside of Rails?  I initially installed everything
using the Hivelogic instructions.