Hi,

Login to the WordPress admin area

Create a new page called "home" (or whatever you want to call it)

In the left hand menu look for "settings" and click

Now look for "reading" and click

At the top of the page you should see "Front page displays"

Next to that, click on the "A static page (select below)" radio button and then choose "home" (the page you have just created) from the drop down menu

That's it

You can change this any time

You can also do this without installing WordPress in a sub domain or sub directory - top level is fine.

Hope it helps and solves your problem?