Set up a RoR application on XAMPP

[mujer_esponja]

Hello,
What I need it is just a question of configuration in my xampp server, but I don't know exactly what.
I have my xampp server running, and I just put my Ruby on Rails application

/opt/lampp/htdocs

Then, I go to http://localhost/myApplication
And I see the folders tree instead of Congratulations, you've put Ruby on Rails! as many tutorials say.
Does anybody know how to set up or include if so the path to my application in my server??
I found help related to Windows:

Apache2\conf\httpd.conf
<VirtualHost *>
ServerName todo
DocumentRoot /www/webroot/ToDo/public
<Directory /www/webroot/ToDo/public/>
Options ExecCGI FollowSymLinks
AllowOverride all
Allow from all
Order allow,deny
</Directory>
</VirtualHost>


So I guess I need something similar in my Ubuntu10.10
Thanks in advance