How do I set my computer up as a server?

Hello, i can help a bit...I designed my own webpage but i use a program for hosting it...it's pretty simple...your firewall might need to be disable and you need to open up a port on your router..so when you connect to it it will have a ip then the port number for example: a href="http://183.34.43.2:1000" rel="nofollow"http://183.34.43.2:1000/a after semicolon is the port number...I only did one webpage..this is what i used: a href="http://www.rejetto.com/hfs/" rel="nofollow"http://www.rejetto.com/hfs//a look it up..because your trying to do more than one site, i will consider using a virtual pc..in this way you can get server 2008 free from microsoft and install it on your virtual computer and be able to do more than one site...with that application that i use it can only be use for one, i haven't tried for more than one..to set your port numbers you need to log in into your router for example in att is http://homeportal and it will take you in there...if your using a linksys or other u need an IP to enter to your router and set up your port..well, this is just a basic general idea of it...if you keep on looking it up might be able to find more info...I also used dreamweaver CS5 for design my webpage..