txt/css file type

Hi, I am trying to understand how to implement Windows application 
which installs software off a CD-ROM. So I got myself a sample of
such CD-ROM. When I double-click on the CD-ROM,
a menu appears with several buttons for installation options.
I was told to look at the file autorun.inf on the CD-ROM
and that this file contains directions for displaying the
buttons. 

The icon for autorun.inf file says that the file type is txt/ccs.

When I open autorun.inf with a text editor, its content is:
[autorun]
open=SETUP.EXE
icon=CD.ICO

I tried opening this file with Internet Explorer, but nothing shows up.

It would be GREATLY appreciated if you provide somem pointers or
any kind of information.

Thanks a lot,
Milica
milica@cat.syr.edu