If I am understanding your menu issue correctly you are talking about you want it to stay stationary.

This should help:

Open:
luna.css

Find:
.navbar {
RIGHT: 159px; LEFT: 250px; FLOAT: right; WIDTH: 850px; POSITION: absolute; TOP: 85px
}

Replace with:
.navbar {
FLOAT: right; WIDTH: 850px; CLEAR: both; MARGIN: 0; PADDING: 0 3px;
}