Installing New Google Fonts

Hi,

I have tried searching for this on the forum, but could not find any references.

I want to install the following font and its variants onto the Highend Theme:

Font: lato
Variants: Thin 100,Light 300, Normal 400, Bold 700

Although Lato is listed on the theme, the variants have not been included.

Could you please suggest how I can do this.

Also, is there a way of increasing the max heading font size above 40.

Many thanks

Garrick