@font-face setup to avoid "faux" bold and italic

gistfile1.txt

@font-face {
    font-family: 'OpenSans';
    src: url('fonts/OpenSans-Regular-webfont.eot');
    src: url('fonts/OpenSans-Regular-webfont.eot?#iefix') format('embedded-opentype'),
         url('fonts/OpenSans-Regular-webfont.woff') format('woff'),
         url('fonts/OpenSans-Regular-webfont.ttf') format('truetype'),
         url('fonts/OpenSans-Regular-webfont.svg#OpenSansRegular') format('svg');
    font-weight: normal;
    font-style: normal;
}

@font-face {
    font-family: 'OpenSans';
    src: url('fonts/OpenSans-Italic-webfont.eot');
    src: url('fonts/OpenSans-Italic-webfont.eot?#iefix') format('embedded-opentype'),
         url('fonts/OpenSans-Italic-webfont.woff') format('woff'),
         url('fonts/OpenSans-Italic-webfont.ttf') format('truetype'),
         url('fonts/OpenSans-Italic-webfont.svg#OpenSansItalic') format('svg');
    font-weight: normal;
    font-style: italic;
}

@font-face {
    font-family: 'OpenSans';
    src: url('fonts/OpenSans-Semibold-webfont.eot');
    src: url('fonts/OpenSans-Semibold-webfont.eot?#iefix') format('embedded-opentype'),
         url('fonts/OpenSans-Semibold-webfont.woff') format('woff'),
         url('fonts/OpenSans-Semibold-webfont.ttf') format('truetype'),
         url('fonts/OpenSans-Semibold-webfont.svg#OpenSansSemibold') format('svg');
    font-weight: bold;
    font-style: normal;
}

@font-face {
    font-family: 'OpenSans';
    src: url('fonts/OpenSans-SemiboldItalic-webfont.eot');
    src: url('fonts/OpenSans-SemiboldItalic-webfont.eot?#iefix') format('embedded-opentype'),
         url('fonts/OpenSans-SemiboldItalic-webfont.woff') format('woff'),
         url('fonts/OpenSans-SemiboldItalic-webfont.ttf') format('truetype'),
         url('fonts/OpenSans-SemiboldItalic-webfont.svg#OpenSansSemiboldItalic') format('svg');
    font-weight: bold;
    font-style: italic;
}