Ok. My Quick Guide, Cos i do this alot for my friends,

http://www.apachefriends.org/en/xampp.html


Download Xampp and install it,

Open Xampp Control Panel and run Apache and MySQL then click Explore then click Htdocs, This will open where you store the files for people to see, Modify the index or just delete it, Next just go to http://localhost/ and check if it works,

Then port forward/Open ports 80 this will allow users to connect to your local host documents,

Next load up No-Ip
Get from Downloads.com
Then make sure you have registered a No-Ip domain on the No-Ip Console make sure it's your IP NOT 192.168.1.2 or anything like that
Check Ip Here http://ipchicken.com

Then if you have port forwarded right and no-ip and xampp are running people who connect to your NO-IP address will view the files currently in that folder