Adding virtual host wamp server windows xp

here is the solution:
open:
c:\wamp\apache\apache2.2.8\bin\conf\httpd.conf

add this at the end of this file

NameVirtualHost *:80
<VirtualHost *:80>
DocumentRoot “e:/testsite/”
ServerName testsite
</VirtualHost>
NameVirtualHost *:80
<VirtualHost *:80>
DocumentRoot “e:/”
ServerName localhost
</VirtualHost>

and now open:
C:\WINDOWS\system32\drivers\etc\hosts

add this at the end
127.0.0.1 localhost
127.0.0.1 testsite

and you can use your testsite using
http://testsite and other projects you can open normal like this:
http://localhost