How can I host multiple websites on a WAMP server?

I am new with Apache and I want to try this:

On a server (IP xx.xx.xx.xx) I would like to host multiple websites (www.website1.xxx, www.website2.yyy, www2.website3.zzz).

I have assigned www.website1.xxx and www2.website3.zzz the IP xx.xx.xx.xx.

In the www folder of the server I have Folder1 (for website1) and Folder2 (for website3).

Now, the problem is that no mather what adress you try to acces, the result is index from Folder1.
The code is as follows:

I use WAMPSERVER on Win XP with Apache 2.2.11

Thank you!

Try this:

Go to your Hosts file:
"C:\windows\system32\drivers\etc"

Add this:
127.0.0.1 website1.xxx
127.0.0.1 website3.zzz
127.0.0.1 www.website1.xxx
127.0.0.1 www.website3.zzz

In your conf file use this:
note: 127.0.0.1 is the ip to most pc's local hosts

Is taking me to the root of www (c:/wamp/www/) for both adresses...

Why must make the modifications in the Hosts file?

Thanks!

@kufu
It's the only way those domains will propogate to your local host. Make sure that those folders exist and that there are valid index.html files in there.

Try this: (added .htacces support and DirectoryIndex so it points to index.html file)

Also, don't forget to restart all services on your wamp server after making changes! Important step.

No change...

But... if I try to access the addresses from local machine, I get only Folder1. If accessed from internet, I get /www index.

EDIT: after each change I restart the Apache server...