You can add your custom fonts by using @font-face. I'd select "no custom font" in the backend and add following code to css/custom.css:
@font-face {
font-family: 'SansationRegular';
src: url('font/Sansation_Regular-webfont.eot');
src: url('font/Sansation_Regular-webfont.eot?#iefix') format('embedded-opentype'),
url('font/Sansation_Regular-webfont.woff') format('woff'),
url('font/Sansation_Regular-webfont.ttf') format('truetype'),
url('font/Sansation_Regular-webfont.svg#SansationRegular') format('svg');
font-weight: normal;
font-style: normal;
}
.flex_column h1, .flex_column h2, .flex_column h3, .flex_column h4, .flex_column h5, .flex_column h6, h1, h2, h3, h4, h5, h6, .hero-text, blockquote, legend, #top .slideshow_caption h1{font-family:"SansationRegular", "HelveticaNeue","Helvetica Neue",Helvetica,Arial,sans-serif}
I.e. the code above would add the Sansation font. You can generate your font-face font here: http://www.fontsquirrel.com/fontface - then place the font files in the css folder (or like I did in the css/font folder which I created first).