Setting up different sites instead of using //localhost

Hi,

This is a followup to my question here:
https://www.experts-exchange.com/questions/21878153/How-to-change-localhost-to-something-else.html

So I installed an old copy of Win2000 Server.

Now i'd like to use a unique url to access each of the sites i'm working on, instead of accessing them thru local host. Eg: //jasonzsite/ -> where jasonzsite is what formerly used to be localhost, or www.clienta.com - > where www.clienta.com is what used to earlier be //localhost

How do I do this "Virtual WebSites" stuff as mentioned in my earlier questions accepted answer?

Thank You