First, I believe that WINXP Home does provide a limited version of IIS 5.0. You need to do the following:
1. Go to the <CONTROL PANEL>
2. Double-click <ADD REMOVE SOFTWARE>
3. Select Windows Components
4. Check the box next to Internet Information Server or IIS
5. Apply the changes -- this installs the software
If this doesn't work I highly recommend getting a REAL web-server like Apache
http://httpd.apache.org/. You should do this anyway.
Learning how to operate IIS is great, but it doesn't give you any other skills. If you learn to use the Apache web server now, then when ever you are confronted with an IIS machine you will be able to figure it out quickly. It doesn't work the other way around.
Best Regards,
Dan Jallits