It actually isn’t a commercial theme, it’s free 🙂
First you have to change the number of pages you want to have by changing the width in rule 40 of style.css. One page has a width of 1600px, so if you want two just do the math.
Than you want to change the total number of photos you want to display over your multiple pages. You can do this in rule 21 of home.php For example: cat=&showposts=84&offset=10, 84 is the total number of photos you want to display, 10 is the number of photos that are already displayed as larger images on the top and therefore do not have to be displayed as smaller images as well.
Also change the offset number in rule 5
Hope this helps!
