MAMP + Multiple Wordpress Sites

I'm trying to develop multiple wordpress sites through MAMP.

I've made one database (called 'wordpress') and then in MAMP>htdocs I created a folder (called 'mysite') and put the wordpress program files in it.

Works perfectly.

Now, however, I'm not exactly sure about how to create a second wordpress site.

I created a different database... but since the htdocs folder is not a database specific folder, I'm not exactly sure what to do next.

Can anyone walk me through it?

Much thanks!