Help Configure My Apache2 &PHP5 Server

Currently I have an Ubuntu Server 12.10 that I have running a single web site. The ISP I use, uses dynamic IP addresses (cable). Because of this, I use a service from [login to view URL] to forward any traffic from my domain to my server. The single web site work perfectly, it is using Virtual Hosting. If someone types: [login to view URL] it takes them them to the web site I host on my Ubuntu server. Web site is in folder /var/www/mywebsite/ What I want to do is host additional web sites on this server. I want to be able to do this in two ways. First way is if someone types: [login to view URL] this web site is stored in /var/www/example1 If someone types: [login to view URL] this web site is stored in /var/www/example2 etc. Second way is If someone types: [login to view URL] this web site is stored in /var/www/anotherdomain An optional third way, which I am not sure it can work, is If someone types: [login to view URL] this web site is stored in /var/www/example3 Access to some of these web sites will need to be be via username/password only. --- My server is also currently hosting rutorrent. To get to it, I type: [login to view URL] It is password protected. I am able to create additional web sites by editing the [login to view URL] file where I can go to: [login to view URL] this web site is stored in /var/www/test1 I am hoping that the the above is very straight forward to a web server guru. Thanks.