Apache on Win XP Home

Hi,
I am running Apache 2 web server on a Win XP Home PC. The apache site
talks about setting up domain user accounts etc in order to "secure"
the server.

By secure, I mean that all I want is for outside people to see the web
sites under htdocs directory. They should not be able to do anything
else harmful to my PC like create directories or read what is on my
harddisk (apart from the pages I want them to see).

All the websites I have read talk about Win XP pro and Win 2003 etc. I
would appreciate any tips on what I need to do with Win XP home to not
have to worry too much.

I realise that no amount of securing will defeat a determined hacker
but I would like to repel the casual "attacks".

Thanks

For technical details:
I have a Net Gear router on which I have Port Forwarded the HTTP
service to port 80 on this PC.
I use dyndns.org to enable people to use a fixed URL.